10-D 1 final_2007-a3.txt 1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-D ASSET-BACKED ISSUER DISTRIBUTION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the monthly distribution period from August 1, 2007 to August 31, 2007 Commission File Number of issuing entity: 333-130333-19 ----------------- CMALT (CITIMORTGAGE ALTERNATIVE LOAN TRUST), SERIES 2007-A3 ------------------------------------------------------------------------ (Exact name of issuing entity as specified in its charter) Commission File Number of depositor: 333-130333 ---------------------- CITICORP MORTGAGE SECURITIES, INC. ------------------------------------------------------------------------ (Exact name of depositor as specified in its charter) CITIMORTGAGE, INC. ------------------------------------------------------------------------- (Exact name of sponsor as specified in its charter) New York ----------------------------------------------------------------------------- (State or other jurisdiction of incorporation or organization of the issuing entity) 32-0199552 and 32-0199551 and 32-0199550 ---------------------------------------------------------------------------- (I.R.S. Employer Identification No.) 1000 Technology Drive, O'Fallon, Missouri 63368-2240 ---------------------------------------- ---------- (Address of principal executive offices of the issuing entity) (Zip Code) (636) 261-1300 ------------------------------------------------------------------------- (Telephone number, including area code) -------------------------------------------------------------------------- (Former name, former address. if changed since last report.) Registered/reporting pursuant to (check one) Title Name of exchange of Class Section 12(b) Section 12(g) Section 15(d) (if Section 12(b)) Class IIA-1 { } { } {X} _____________ Class IIA-IO { } { } {X} _____________ Class IA-1 { } { } {X} _____________ Class IA-2 { } { } {X} _____________ Class IA-3 { } { } {X} _____________ Class IA-4 { } { } {X} _____________ Class IA-5 { } { } {X} _____________ Class IA-6 { } { } {X} _____________ Class IA-7 { } { } {X} _____________ Class IA-8 { } { } {X} _____________ Class IA-9 { } { } {X} _____________ Class IA-10 { } { } {X} _____________ Class IA-11 { } { } {X} _____________ Class IA-12 { } { } {X} _____________ Class IA-IO { } { } {X} _____________ Class A-PO { } { } {X} _____________ Class B-1 { } { } {X} _____________ Class B-2 { } { } {X} _____________ Class B-3 { } { } {X} _____________ Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes{X} No{ } 1 2 Part I - DISTRIBUTION INFORMATION Item 1. Distribution and Pool Performance Information On September 25, 2007 a distribution was made to holders of Citicorp Mortgage Securities, Inc CMALT. REMIC Pass-Through Certificates, Series 2007-A3 issued by Citicorp Mortgage Securities Trust CMALT, Series 2007-A3. The monthly distribution report is attached as an Exhibit to this Form 10-D. Please see Item 9(b), Exhibit 99.1. Part II - OTHER INFORMATION Item 7. Significant Enhancement Provider Information Not Applicable Item 9. Exhibits (a) The following are documents filed as part of this Form 10-D: (99.1) Monthly distribution report for the month of August 2007. (b) Exhibits required to be filed by Form 10-D and Item 601 of Regulation S-K: (4.1) Pooling and Servicing Agreement, dated as of March 01, 2007, among Citicorp Mortgage Securities, Inc., CitiMortgage, Inc., U.S. Bank National Association, and Citibank, N.A. (incorporated by reference to Exhibit 4.1 to the Current Report on Form 8-K filed by the issuing entity with the Securities and Exchange Commission on April 06, 2007.) (10.1) Form of Mortgage Loan Purchase Agreement, dated March 01, 2007, between Citicorp Mortgage Securities, Inc. and CitiMortgage, Inc. (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed by the issuing entity with the Securities and Exchange Commission on April 06, 2007.) (99.1) Monthly distribution report for the month of August 2007. 2 3 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. CITICORP MORTGAGE SECURITIES, INC. Depositor By: /s/ Cathy Johnson ------------------------- Cathy Johnson Assistant Vice President Dated: September 24, 2007 3 Exhibit No. Description ----------- ------------- (99.1) Monthly distribution report for the month of August 2007. 4 EXHIBIT 99.1 ------------- Citicorp Mortgage Securities, Inc. CMALT Distribution Date Statement to Certificateholders Remic Pass-Through Certificate Series Name: CMALT 2007-A3 Payment Date: 09/25/2007 Issuer: Citicorp Mortgage Securities, Inc. CMALT Record Date: See footnote Determination Date: 09/18/2007 Distribution Date: 25-Sep-07 Distribution #: 6 W.A.C. 6.58% Trustee U.S. Bank National Association Maryellen Hunter (617) 603-6401 Bond Administrator CitiMortgage, Inc. Valentina Polonskaya (636) 261-1342 Paying Agent: Citibank N.A. Nancy Forte (212) 816-5685

--------------------------------------------------------------------------------------------------------------------------------- Next Accrual Accrual Current Succeeding Start End Class Coupon Type Coupon Coupon Date Date Original Par CUSIP # --------------------------------------------------------------------------------------------------------------------------------- IIA-1 Fixed 5.50000% 5.50000% 0508/01/2007 0508/31/2007 $14,048,000.00 12567AAP2 **~ IIA-IO WAC IO 0.~~36923~~38065% 0.~~36937~~38075% 0508/01/2007 0508/31/2007 $14,241,366.14 12567AAQ0 ------------------- Class A-15yr Total $14,048,000.00 ~ IA-1 Libor/Fixed 6.00000% 6.00000% 0508/01/2007 0508/31/2007 $60,000,000.00 12567AAA5 ~ IA-2 Libor Super Snr 56.~~92000~~00000% 5.~~92000~~73125% 0508/25/2007 0609/24/2007 $86,382,000.00 12567AAB3 **~ IA-3 Inv Libor IO 0.~~08000~~00000% 0.~~08000~~26875% 0508/25/2007 0609/24/2007 $86,382,000.00 12567AAC1 ~ IA-4 NAS Spr Snr 5.75000% 5.75000% 0508/01/2007 0508/31/2007 $88,350,000.00 12567AAD9 IA-5 Super Senior 6.00000% 6.00000% 0508/01/2007 0508/31/2007 $25,000,000.00 12567AAE7 IA-6 Super Snr Sup 6.00000% 6.00000% 0508/01/2007 0508/31/2007 $9,950,000.00 12567AAF4 ~ IA-7 Super Senior 5.75000% 5.75000% 0508/01/2007 0508/31/2007 $177,995,000.00 12567AAG2 IA-8 NAS-Spr Snr Sup 6.00000% 6.00000% 0508/01/2007 0508/31/2007 $8,132,000.00 12567AAH0 IA-9 Fixed 6.00000% 6.00000% 0508/01/2007 0508/31/2007 $3,630,000.00 12567AAJ6 **~ IA-10 Inv LIBOR IO 0.00000% 0.00000% 0508/01/2007 0508/31/2007 $60,000,000.00 12567AAK3 **~ IA-11 Inv IO 0.25000% 0.25000% 0508/01/2007 0508/31/2007 $177,995,000.00 12567AAL1 **~ IA-12 Inv IO 0.25000% 0.25000% 0508/01/2007 0508/31/2007 $88,350,000.00 12567AAM9 **~ IA-IO WAC IO 0.~~37754~~37172% 0.~~37656~~36910% 0508/01/2007 0508/31/2007 $463,688,021.11 12567AAN7 ------------------- Class A-30yr Reg/IO Total $459,439,000.00 ~ A-PO Principal Only 0.00000% 0.00000% 0508/01/2007 0508/31/2007 $801,797.00 12567AAR8 ------------------- Class A-COMB Total $801,797.00 B-1 Subordinated 5.~~98523~~98536% 5.~~98528~~98541% 0508/01/2007 0508/31/2007 $12,745,000.00 12567AAS6 B-2 Subordinated 5.~~98523~~98536% 5.~~98528~~98541% 0508/01/2007 0508/31/2007 $3,998,000.00 12567AAT4 B-3 Subordinated 5.~~98524~~98536% 5.~~98528~~98541% 0508/01/2007 0508/31/2007 $3,249,000.00 12567AAU1 B-4 Subordinated 5.~~98524~~98536% 5.~~98528~~98541% 0508/01/2007 0508/31/2007 $2,249,000.00 12567AAV9 B-5 Subordinated 5.~~98523~~98537% 5.~~98528~~98541% 0508/01/2007 0508/31/2007 $1,749,000.00 12567AAW7 B-6 Subordinated 5.~~98524~~98536% 5.~~98528~~98541% 0508/01/2007 0508/31/2007 $1,499,692.00 12567AAX5 ------------------- Class SUB Total $25,489,692.00 =================== $499,778,489.00 ** Denotes Notional Balance ~ These classes constitute regular interests in a separate REMIC election in the same trust. Record Date: For a distribution day, the close of business on (a) for a LIBOR class, the last day (whether or not a business day) of its last LIBOR accrual period preceding the distribution day, and (b) for any other class, the last day of the preceding month.

6 Citicorp Mortgage Securities, Inc. CMALT Distribution Date Statement to Certificate Holders Remic Pass-Through Certificate Series Name: CMALT 2007-A3 Payment Date: 09/25/2007

---------------------------------------------------------------------------------------------------------------- Non Interest Supported * Interest Interest Principal CLASS Accrued Shortfall Shortfall Recoveries Recoveries Interest Paid ---------------------------------------------------------------------------------------------------------------- IIA-1 $6359,~~242~~795.1558 $0.00 $0.00 $0.00 $0.00 $6359,~~242~~795.1558 IIA-IO $4,~~305~~200.2516 $0.00 $0.00 $0.00 $0.00 $4,~~305~~200.2516 ----------------------------------------------------------------------------------------------------- A-15yr Total $6763,~~547~~995.4074 $0.00 $0.00 $0.00 $0.00 $6763,~~547~~995.4074 IA-1 $300,000.00 $0.00 $0.00 $0.00 $0.00 $300,000.00 IA-2 $~~414~~397,~~481~~526.9551 $0.00 $0.00 $0.00 $0.00 $~~414~~397,~~481~~526.9551 IA-3 $~~5,601~~0.1100 $0.00 $0.00 $0.00 $0.00 $~~5,601~~0.1100 IA-4 $423,343.75 $0.00 $0.00 $0.00 $0.00 $423,343.75 IA-5 $~~121~~117,~~924~~413.0984 $0.00 $0.00 $0.00 $0.00 $~~121~~117,~~924~~413.0984 IA-6 $4846,~~525~~730.7971 $0.00 $0.00 $0.00 $0.00 $4846,~~525~~730.7971 IA-7 $~~831~~801,~~905~~131.3325 $0.00 $0.00 $0.00 $0.00 $~~831~~801,~~905~~131.3325 IA-8 $40,660.00 $0.00 $0.00 $0.00 $0.00 $40,660.00 IA-9 $18,150.00 $0.00 $0.00 $0.00 $0.00 $18,150.00 IA-10 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 IA-11 $3634,~~169~~831.8079 $0.00 $0.00 $0.00 $0.00 $3634,~~169~~831.8079 IA-12 $18,406.25 $0.00 $0.00 $0.00 $0.00 $18,406.25 IA-IO $~~143~~137,~~493~~572.1676 $0.00 $0.00 $0.00 $0.00 $~~143~~137,~~493~~572.1676 ----------------------------------------------------------------------------------------------------- A-30yr Reg/I $2,~~402~~335,~~661~~766.2386 $0.00 $0.00 $0.00 $0.00 $2,~~402~~335,~~661~~766.2386 A-PO $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 ----------------------------------------------------------------------------------------------------- A-COMB Total $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 RES $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 ----------------------------------------------------------------------------------------------------- RES Total $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 B-1 $63,~~495~~384.1976 $0.00 $0.00 $0.00 $0.00 $63,~~495~~384.1976 B-2 $19,~~917~~883.9127 $0.00 $0.00 $0.00 $0.00 $19,~~917~~883.9127 B-3 $16,~~186~~158.4226 $0.00 $0.00 $0.00 $0.00 $16,~~186~~158.4226 B-4 $11,~~204~~184.4596 $0.00 $0.00 $0.00 $0.00 $11,~~204~~184.4596 B-5 $8,~~713~~698.4631 $0.00 $0.00 $0.00 $0.00 $8,~~713~~698.4631 B-6 $7,~~471~~458.42 $0.00 $0.00 $0.00 $0.00 $7,~~471~~458.42 ----------------------------------------------------------------------------------------------------- SUB Total $126,~~988~~767.8598 $0.00 $0.00 $0.00 $0.00 $126,~~988~~767.8598 ====================================================================================================== Total $2,~~597~~526,~~197~~530.4858 $0.00 $0.00 $0.00 $0.00 $2,~~597~~526,~~197~~530.4858 * Regular and residual interests have equal rights to service fee to reduce non-supported prepayment interest shortfalls.

----------------------------------------------------------------------------- Interest Cum Unpaid Relief Act Paid Per Interest Interest CLASS Certificate Shortfalls Shortfalls ----------------------------------------------------------------------------- IIA-1 4.~~50186147~~25651908 $0.00 $0.00 IIA-IO 0.~~30230597~~29492676 $0.00 $0.00 -------------------------------------- A-15yr Total $0.00 $0.00 IA-1 5.00000000 $0.00 $0.00 IA-2 4.~~79824443~~60196001 $0.00 $0.00 IA-3 0.~~06484117~~00000000 $0.00 $0.00 IA-4 4.79166667 $0.00 $0.00 IA-5 4.~~87696360~~69655360 $0.00 $0.00 IA-6 4.~~87696382~~69655377 $0.00 $0.00 IA-7 4.~~67375673~~50086379 $0.00 $0.00 IA-8 5.00000000 $0.00 $0.00 IA-9 5.00000000 $0.00 $0.00 IA-10 0.00000000 $0.00 $0.00 IA-11 0.~~20320683~~19568971 $0.00 $0.00 IA-12 0.20833333 $0.00 $0.00 IA-IO 0.~~30946057~~29669250 $0.00 $0.00 -------------------------------------- A-30yr Reg/IO $0.00 $0.00 A-PO 0.00000000 $0.00 $0.00 -------------------------------------- A-COMB Total $0.00 $0.00 RES 0.00000000 $0.00 $0.00 -------------------------------------- RES Total $0.00 $0.00 B-1 4.~~98196862~~97330404 $0.00 $0.00 B-2 4.~~98196848~~97330415 $0.00 $0.00 B-3 4.~~98196984~~97330255 $0.00 $0.00 B-4 4.~~98196976~~97330369 $0.00 $0.00 B-5 4.~~98196684~~97330475 $0.00 $0.00 B-6 4.~~98196963~~97330118 $0.00 $0.00 -------------------------------------- SUB Total $0.00 $0.00 ========================================== Total $0.00 $0.00

7 Citicorp Mortgage Securities, Inc. CMALT Distribution Date Statement to Certificateholders Remic Pass-Through Certificate Series Name: CMALT 2007-A3 Payment Date: 09/25/2007

--------------------------------------------------------------------------------------------------------------- Certificate Reductions not part of Principal distributions Paid Cumulative Principal to reduce Principal Per Principal CLASS Due Stated Amount Paid Certificate Loss --------------------------------------------------------------------------------------------------------------- IIA-1 $51,~~409~~924.1316 $0.00 $51,~~409~~924.1316 3.~~65953374~~69619590 0.00 IIA-IO $.00 $0.00 $.00 0.00000000 0.00 ---------------------------------------------------------------------------------------------------- A-15yr Total $51,~~409~~924.1316 $0.00 $51,~~409~~924.1316 0.00 IA-1 $.00 $0.00 $.00 0.00000000 0.00 IA-2 $88989,~~653~~257.3884 $0.00 $88989,~~653~~257.3884 111.~~02629460~~45212938 0.00 IA-3 $.00 $0.00 $.00 0.00000000 0.00 IA-4 $.00 $0.00 $.00 0.00000000 0.00 IA-5 $307,591.16 $0.00 $307,591.16 12.30364640 0.00 IA-6 $122,421.28 $0.00 $122,421.28 12.30364623 0.00 IA-7 $2,189,987.56 $0.00 $2,189,987.56 12.30364651 0.00 IA-8 $.00 $0.00 $.00 0.00000000 0.00 IA-9 $.00 $0.00 $.00 0.00000000 0.00 IA-10 $.00 $0.00 $.00 0.00000000 0.00 IA-11 $.00 $0.00 $.00 0.00000000 0.00 IA-12 $.00 $0.00 $.00 0.00000000 0.00 IA-IO $.00 $0.00 $.00 0.00000000 0.00 ---------------------------------------------------------------------------------------------------- -30yr Reg/IO Total $23,~~708~~609,~~653~~257.3884 $0.00 $23,~~708~~609,~~653~~257.3884 0.00 A-PO $~~617~~598.2884 $0.00 $~~617~~598.2884 0.~~76987068~~74687234 0.00 ---------------------------------------------------------------------------------------------------- A-COMB Total $~~617~~598.2884 $0.00 $~~617~~598.2884 0.00 B-1 $7,~~426~~568.2364 $0.00 $7,~~426~~568.2364 0.~~58267791~~59385171 0.00 B-2 $2,~~329~~374.5421 $0.00 $2,~~329~~374.5421 0.~~58267634~~59384942 0.00 B-3 $1,~~893~~929.1242 $0.00 $1,~~893~~929.1242 0.~~58267775~~59385042 0.00 B-4 $1,~~310~~335.4457 $0.00 $1,~~310~~335.4457 0.~~58267675~~59385060 0.00 B-5 $1,~~019~~038.1064 $0.00 $1,~~019~~038.1064 0.~~58267581~~59384791 0.00 B-6 $~~873~~890.8459 $0.00 $~~873~~890.8459 0.~~58267964~~59384860 0.00 ---------------------------------------------------------------------------------------------------- SUB Total $1415,~~852~~137.2707 $0.00 $1415,~~852~~137.2707 0.00 ===================================================================================================== Total $23,~~775~~676,~~532~~917.0691 $0.00 $23,~~775~~676,~~532~~917.0691 0.00

8 Citicorp Mortgage Securities, Inc. CMALT Distribution Date Statement to Certificateholders Remic Pass-Through Certificate Series Name: CMALT 2007-A3 Payment Date: 09/25/2007

----------------------------------------------------------------------------------------------------------------------------------- CLASS Previous Period's Ending Period's Beginning Balance Ending Balance Ending Balance Beginning Ending Prepayment Balance Balance Per Certificate Per Certificate Pool Factor Class PCT Class PCT Percentage ----------------------------------------------------------------------------------------------------------------------------------- IIA-1 $13,~~798~~046,~~286~~307.2594 $1312,~~746~~994,~~877~~383.1278 ~~982~~928.~~22424900~~69504129 ~~978~~924.~~56471526~~99884539 0.~~97856472~~92499885 94.~~832255409~~605058507% 94.~~831149404~~603086374% 100.000000000% ** IIA-IO $13,~~992~~241,~~184~~065.4742 $13,~~941~~189,~~078~~393.5993 ~~982~~929.~~50296583~~76090144 ~~978~~926.~~91441404~~13263365 0.~~97891441~~92613263 0.000000000% 0.000000000% 0.000000000% ----------------------------------------------------------------------------------------------------------------------- A-15yr Tot $13,~~798~~046,~~286~~307.2594 $1312,~~746~~994,~~877~~383.1278 94.~~832255409~~605058507% 94.~~831149404~~603086374% 100.000000000% IA-1 $60,000,000.00 $60,000,000.00 1,000.00000000 1,000.00000000 1.00000000 12.~~590702307~~922388837% 1213.~~663003211~~023978642% 0.000000000% IA-2 $8479,~~016~~505,~~612~~302.4531 $8378,~~927~~516,~~959~~044.0747 ~~972~~920.~~61712452~~39200655 ~~971~~908.~~59082992~~93987717 0.~~97159083~~90893988 17.~~630469270~~123307185% 17.~~713000254~~043188104% 5763.~~487440062~~684164043% ** IA-3 $8479,~~016~~505,~~612~~302.4531 $8378,~~927~~516,~~959~~044.0747 ~~972~~920.~~61712452~~39200655 ~~971~~908.~~59082992~~93987717 0.~~97159083~~90893988 0.000000000% 0.000000000% 0.000000000% IA-4 $88,350,000.00 $88,350,000.00 1,000.00000000 1,000.00000000 1.00000000 1819.~~539809147~~028217563% 1819.~~646272229~~177808551% 0.000000000% IA-5 $2423,~~384~~482,~~817~~767.6871 $2423,~~077~~175,~~226~~176.5255 ~~975~~939.~~39270720~~31070840 ~~963~~927.~~08906080~~00706200 0.~~96308906~~92700706 5.~~117033003~~057557588% 5.~~081499946~~030550073% 4.~~991025844~~263522970% IA-6 $9,~~705~~346,~~157~~141.4456 $9,~~582~~223,~~736~~720.1628 ~~975~~939.~~39270754~~31070955 ~~963~~927.~~08906131~~00706332 0.~~96308906~~92700706 2.~~036579136~~012907922% 2.~~022436979~~002158932% 1.~~986428286~~696882142% IA-7 $~~173~~167,~~615~~192,~~024~~609.8848$~~171~~165,~~425~~002,~~037~~621.3292 ~~975~~939.~~39270699~~31070805 ~~963~~927.~~08906048~~00706155 0.~~96308906~~92700706 36.~~432251571~~008798507% 3635.~~179263303~~816510398% 3530.~~535105807~~355430843% IA-8 $8,132,000.00 $8,132,000.00 1,000.00000000 1,000.00000000 1.00000000 1.~~706459852~~751414433% 1.~~716259035~~765183238% 0.000000000% IA-9 $3,630,000.00 $3,630,000.00 1,000.00000000 1,000.00000000 1.00000000 0.~~761737489~~781804524% 0.~~766111694~~787950707% 0.000000000% ** IA-10 $60,000,000.00 $60,000,000.00 1,000.00000000 1,000.00000000 1.00000000 0.000000000% 0.000000000% 0.000000000% ** IA-11 $~~173~~167,~~615~~192,~~024~~609.8848$~~171~~165,~~425~~002,~~037~~621.3292 ~~975~~939.~~39270699~~31070805 ~~963~~927.~~08906048~~00706155 0.~~96308906~~92700706 0.000000000% 0.000000000% 0.000000000% ** IA-12 $88,350,000.00 $88,350,000.00 1,000.00000000 1,000.00000000 1.00000000 0.000000000% 0.000000000% 0.000000000% ** IA-IO $~~456~~444,~~088~~121,~~050~~058.0852$~~453~~440,~~383~~514,~~146~~805.1700 ~~983~~957.~~60973179~~80144904 ~~977~~950.~~77627527~~02412170 0.~~97777628~~95002412 0.000000000% 0.000000000% 0.000000000% ----------------------------------------------------------------------------------------------------------------------- A-30yrReg/ $~~451~~439,~~833~~638,~~612~~821.4506$~~449~~436,~~124~~029,~~959~~563.0722 94.~~815041777~~686396564% 94.~~787846654~~647328650% 100.000000000% A-PO $~~800~~794,~~659~~208.1405 $~~800~~793,~~041~~609.8621 ~~998~~990.~~58086274~~53507309 ~~997~~989.~~81099206~~78820075 0.~~99781099~~98978820 0.000000000% 0.000000000% 0.000000000% ----------------------------------------------------------------------------------------------------------------------- A-COMB Tot $~~800~~794,~~659~~208.1405 $~~800~~793,~~041~~609.8621 0.000000000% 0.000000000% 0.000000000% B-1 $12,~~730~~707,~~367~~950.5215 $12,~~722~~700,~~941~~381.2951 ~~998~~997.~~85190428~~09298941 ~~998~~996.~~26922636~~49913770 0.~~99826923~~99649914 2.~~592255434~~658006891% 2.~~605465418~~677008479% 0.000000000% B-2 $3,~~993~~986,~~409~~377.9279 $3,~~991~~984,~~080~~003.3858 ~~998~~997.~~85190595~~09299400 ~~998~~996.~~26922961~~49914457 0.~~99826923~~99649914 0.~~813168869~~833794554% 0.~~817312732~~839755196% 0.000000000% B-3 $3,~~245~~239,~~269~~555.8413 $3,~~243~~237,~~376~~625.7271 ~~998~~997.~~85190520~~09299169 ~~998~~996.~~26922745~~49914127 0.~~99826923~~99649914 0.~~660826827~~677588419% 0.~~664194362~~682432372% 0.000000000% B-4 $2,~~246~~242,~~417~~462.9314 $2,~~245~~241,~~107~~126.4957 ~~998~~997.~~85190307~~09299244 ~~998~~996.~~26922632~~49914184 0.~~99826923~~99649914 0.~~457432912~~469035505% 0.~~459763964~~472388552% 0.000000000% B-5 $1,~~746~~743,~~991~~915.9965 $1,~~745~~742,~~972~~877.8901 ~~998~~997.~~85190966~~09299600 ~~998~~996.~~26923385~~49914808 0.~~99826923~~99649915 0.~~355735957~~364759049% 0.~~357548768~~367366644% 0.000000000% B-6 $1,~~497~~495,~~970~~332.2138 $1,~~497~~494,~~096~~441.3779 ~~998~~997.~~85190426~~09298976 ~~998~~996.~~26922461~~49914116 0.~~99826922~~99649914 0.~~305028225~~312765137% 0.~~306582631~~315001036% 0.000000000% ----------------------------------------------------------------------------------------------------------------------- SUB Total $25,~~460~~415,~~427~~593.4124 $25,~~445~~400,~~575~~456.1417 5.~~184448227~~315949557% 5.~~210867877~~353952281% 0.000000000% ====================================================================================================================== Total $~~491~~478,~~892~~894,~~985~~930.2529 $~~489~~475,~~117~~218,~~453~~012.1938 PO Balance $~~800~~794,~~659~~208.1405 $~~800~~793,~~041~~609.8621 Non PO Bal $~~491~~478,~~092~~100,~~326~~722.1124 $~~488~~474,~~317~~424,~~411~~403.3317

9 Citicorp Mortgage Securities, Inc. CMALT Distribution Date Statement to Certificateholders Remic Pass-Through Certificate Series Name: CMALT 2007-A3 Payment Date: 09/25/2007 Delinquency Status - Determined by the MBA Method -------------------------------------------------- 30 - 59 days Delq 60+ days Book Value REO ----------------------------------------------------- Number 17 11 0 Amount $6,793,434.92 $3,408,934.40 $0.00 Stated Collateral Information ------------------------------- Service Fees Begin Balance Aggregate Adj Balance -------------------------------------------------------------------- $37,464.46 $478,894,930.53 $475,218,012.62 Advances ------------ Voluntary Advances $0.00 Trustee Advances $0.00 Advance Account Advances $0.00 Certificate Account Advances $154,290.98 Summary of Disbursements ------------------------- Withdrawals Remittances Residual and (Deposits) P&I Distributed ----------------------------------------------------------------- $6,203,448.49 $0.00 $0.00 $6,203,448.49 Current Month Yield Maintenance Payment: $6,275.06 Deposits to Certificate Account ----------------------------------------------------------------- Type Retained by CMI Amount Balance ----------------------------------------------------------------- IA-2 Yield Maintenance Payment No $6,275.06 $6,275.06 Deposits to Certificate Account ----------------------------------------------------------------- Type Retained by CMI Amount Balance ----------------------------------------------------------------- Reserve Fund - IA-1 No $75,000.00 $450,000.00 Yield Maintenance Reserve Fund Begin Remaining Balance Deposits Withdrawals Balance -------------------------------------------------- 0.00 0.00 $0.00 0.00 Citicorp Mortgage Securities, Inc. Distribution Date Statement to Certificateholders Remic Pass-Through Certificate Series Name: CMALT 2007-A3 Payment Date: 09/25/2007 Loans repurchased in the current period: Loan Number Scheduled Principal Balance Pool/Group -------------------------------------------------------- No repurchases for this period 10 Citicorp Mortgage Securities, Inc. CMALT Distribution Date Statement to Certificateholders Remic Pass-Through Certificate Series Name: CMALT 2007-A3 Payment Date: 09/25/2007 COLLATERAL INFORMATION: GENERAL INFORMATION: AT ISSUE BEGINNING ENDING WAC-SCHED BAL 6.59% 6.58% WAM 353 347 346 AVG LTV 71 71 71 AVG LOAN SIZE $293,815 $289,888 $289,238 # OF LOANS 1,701 1,652 1,643 ACTUAL BALANCE $499,778,489.24 $479,120,923.00 $475,439,417.94 SCHEDULED BALANCE $499,778,489.24 $478,894,930.53 $475,218,012.62 TYPE OF DWELLING UNIT: AT ISSUE CURRENT SNGL FAM DET 78% 78% 2-4 FAMILY 9% 9% TOWNHOUSE 3% 3% CONDOMINIUM 9% 9% COOPERATIVE 1% 1% GEOGRAPHIC DISTRIBUTION: LTV DISTRIBUTION: AT ISSUE CURRENT AT ISSUE CURRENT 65% AND BELOW 24% 23% CA 30% CA 30% 65.01-75% 25% 24% FL 7% FL 7% 75.01-80% 49% 51% NY 7% NY 7% OVER 80% 2% 2% NJ 5% NJ 5% IL 5% IL 5% OTHER 46% OTHER 46% CREDIT ENHANCEMENT: AT ISSUE CURRENT SUBORDINATION 5.10% $25,489,692.00 5.35% $25,400,456.17 CUMULATIVE LOSS REDUCTION $0.00 PREPAYMENT INFORMATION: SCHEDULED PRINCIPAL: $284,617.54 PRINCIPAL PREPAYMENTS: $3,392,300.37 1 MONTH 3 MONTH 12 MONTH CUMULATIVE PRICING SPEED(CPR):See Prospectus PREPAYMENT HISTORY(PSA): 585% 855% 0% 989% PREPAYMENT HISTORY(CPR): 8.19% 10.27% 0.00% 8.96% DELINQUENCY (1)

--------------------------------------------------------------------------------------------------------- Number of Amount of Scheduled Amount of Actual Pool Item loans Balance Balance # PCT Amount PCT Amount PCT --------------------------------------------------------------------------------------------------------- (2) 30-59 Days 2017 1.1903% $56,~~830~~788,~~028~~415.0059 1.1943% $56,~~832~~793,~~373~~434.8892 1.1943% (2) 60-89 Days 45 0.2430% $1,~~456~~034,~~641~~731.0452 0.3022% $1,~~458~~035,~~234~~686.8274 0.3022% (2) 90 + Days 16 0.0637% $~~247~~2,~~300~~369,121.0087 0.0550% $~~247~~2,~~300~~373,247.0066 0.0550% REAL ESTATE OWNED BY THE TRUST 0 0.00% $0.00 0.00% $0.00 0.00% FORECLOSURES IN PROCESS 04 0.0024% $01,519,416.0021 0.0032% $01,522,002.0077 0.0032% BANKRUPTCIES IN PROCESS 12 0.0612% $~~223~~555,~~977~~416.2751 0.0512% $~~224~~555,~~161~~604.9556 0.0512% PURCHASE AMOUNT ADVANCES NA

(1) DETERMINED BY THE MBA METHOD. (2) DOES NOT INCLUDE REAL ESTATE OWNED BY THE TRUST. ------------------------------------------------------------------------------- 30 YR REG COLLATERAL INFORMATION: GENERAL INFORMATION: AT ISSUE BEGINNING ENDING WAC-SCHED BAL 6.61% 6.59% WAM 356 351 350 AVG LTV 71 71 71 AVG LOAN SIZE $272,745 $268,020 $266,935 # OF LOANS 939 913 908 ACTUAL BALANCE $256,107,923.57 $244,891,198.29 $242,560,640.21 SCHEDULED BALANCE $256,107,923.57 $244,701,895.72 $242,377,283.80 TYPE OF DWELLING UNIT: AT ISSUE CURRENT SNGL FAM DET 78% 78% 2-4 FAMILY 11% 11% TOWNHOUSE 2% 2% CONDOMINIUM 8% 8% COOPERATIVE 1% 1% GEOGRAPHIC DISTRIBUTION: LTV DISTRIBUTION: AT ISSUE CURRENT AT ISSUE CURRENT 65% AND BELOW 25% 25% CA 28% CA 27% 65.01-75% 27% 27% FL 8% FL 8% 75.01-80% 45% 45% NY 7% NY 7% OVER 80% 3% 3% NJ 6% NJ 6% MA 6% MA 5% OTHER 45% OTHER 47% PREPAYMENT INFORMATION: SCHEDULED PRINCIPAL: $234,938.89 PRINCIPAL PREPAYMENTS: $2,089,673.03 1 MONTH 3 MONTH 12 MONTH CUMULATIVE PRICING SPEED(CPR):See Prospectus PREPAYMENT HISTORY(PSA): 701% 859% 0% 1,041% PREPAYMENT HISTORY(CPR): 9.81% 10.32% 0.00% 9.44% DELINQUENCY (1)

--------------------------------------------------------------------------------------------------------- Number of Amount of Scheduled Amount of Actual Pool Item loans Balance Balance # PCT Amount PCT Amount PCT --------------------------------------------------------------------------------------------------------- (2) 30-59 Days 57 0.5477% $12,~~318~~810,~~776~~431.2750 01.5316% $12,~~321~~815,~~122~~450.1583 01.5316% ARM (2) 60-89 Days 21 0.2211% $~~709~~392,~~516~~581.0473 0.2816% $~~711~~393,~~109~~536.8295 0.2816% (2) 90 + Days 02 0.0022% $01,042,696.0087 0.0043% $01,046,822.0066 0.0043% REAL ESTATE OWNED BY THE TRUST 0 0.00% $0.00 0.00% $0.00 0.00% FORECLOSURES IN PROCESS 01 0.0011% $0524,991.0021 0.0022% $0527,577.0077 0.0022% BANKRUPTCIES IN PROCESS 1 0.11% $223,~~977~~416.2751 0.09% $~~224~~223,~~161~~604.9556 0.09% PURCHASE AMOUNT ADVANCES NA

(1) DETERMINED BY THE MBA METHOD. (2) DOES NOT INCLUDE REAL ESTATE OWNED BY THE TRUST. ------------------------------------------------------------------------------- 15 YR COLLATERAL INFORMATION: GENERAL INFORMATION: AT ISSUE BEGINNING ENDING WAC-SCHED BAL 6.10% 6.11% WAM 178 173 172 AVG LTV 57 56 56 AVG LOAN SIZE $235,356 $222,776 $221,894 # OF LOANS 63 62 62 ACTUAL BALANCE $14,827,404.93 $13,848,573.60 $13,795,228.17 SCHEDULED BALANCE $14,827,404.93 $13,812,104.29 $13,757,401.09 TYPE OF DWELLING UNIT: AT ISSUE CURRENT SNGL FAM DET 84% 83% 2-4 FAMILY 12% 13% TOWNHOUSE 0% 0% CONDOMINIUM 4% 4% COOPERATIVE 0% 0% GEOGRAPHIC DISTRIBUTION: LTV DISTRIBUTION: AT ISSUE CURRENT AT ISSUE CURRENT 65% AND BELOW 62% 65% CA 23% CA 24% 65.01-75% 19% 16% NJ 15% NJ 16% 75.01-80% 19% 19% NY 14% NY 15% OVER 80% 0% 0% FL 8% FL 8% MI 5% MI 5% OTHER 35% OTHER 32% PREPAYMENT INFORMATION: SCHEDULED PRINCIPAL: $49,678.65 PRINCIPAL PREPAYMENTS: $5,024.55 1 MONTH 3 MONTH 12 MONTH CUMULATIVE PRICING SPEED(CPR):See Prospectus PREPAYMENT HISTORY(PSA): 28% 1,314% 0% 1,119% PREPAYMENT HISTORY(CPR): 0.39% 15.80% 0.00% 10.15% DELINQUENCY (1)

--------------------------------------------------------------------------------------------------------- Number of Amount of Scheduled Amount of Actual Pool Item loans Balance Balance # PCT Amount PCT Amount PCT --------------------------------------------------------------------------------------------------------- (2) 30-59 Days 01 01.0061% $0639,875.0076 04.0065% $0639,875.0076 04.0065% FIXED (2) 60-89 Days 0 0.00% $0.00 0.00% $0.00 0.00% (2) 90 + Days 0 0.00% $0.00 0.00% $0.00 0.00% REAL ESTATE OWNED BY THE TRUST 0 0.00% $0.00 0.00% $0.00 0.00% FORECLOSURES IN PROCESS 0 0.00% $0.00 0.00% $0.00 0.00% BANKRUPTCIES IN PROCESS 0 0.00% $0.00 0.00% $0.00 0.00% PURCHASE AMOUNT ADVANCES NA

(1) DETERMINED BY THE MBA METHOD. (2) DOES NOT INCLUDE REAL ESTATE OWNED BY THE TRUST. ------------------------------------------------------------------------------- 30 YR IO COLLATERAL INFORMATION: GENERAL INFORMATION: AT ISSUE BEGINNING ENDING WAC-SCHED BAL 6.61% 6.60% WAM 359 354 353 AVG LTV 73 73 73 AVG LOAN SIZE $327,386 $325,526 $325,532 # OF LOANS 699 677 673 ACTUAL BALANCE $228,843,160.74 $220,381,151.11 $219,083,549.56 SCHEDULED BALANCE $228,843,160.74 $220,380,930.52 $219,083,327.73 TYPE OF DWELLING UNIT: AT ISSUE CURRENT SNGL FAM DET 80% 78% 2-4 FAMILY 7% 7% TOWNHOUSE 3% 4% CONDOMINIUM 9% 10% COOPERATIVE 1% 1% GEOGRAPHIC DISTRIBUTION: LTV DISTRIBUTION: AT ISSUE CURRENT AT ISSUE CURRENT 65% AND BELOW 19% 19% CA 34% CA 34% 65.01-75% 22% 22% FL 6% FL 6% 75.01-80% 58% 58% NY 6% NY 6% OVER 80% 1% 1% IL 5% AZ 5% AZ 5% IL 5% OTHER 44% OTHER 44% PREPAYMENT INFORMATION: SCHEDULED PRINCIPAL: $0.00 PRINCIPAL PREPAYMENTS: $1,297,602.79 1 MONTH 3 MONTH 12 MONTH CUMULATIVE PRICING SPEED(CPR):See Prospectus PREPAYMENT HISTORY(PSA): 489% 819% 0% 922% PREPAYMENT HISTORY(CPR): 6.84% 9.84% 0.00% 8.35% DELINQUENCY (1)

--------------------------------------------------------------------------------------------------------- Number of Amount of Scheduled Amount of Actual Pool Item loans Balance Balance # PCT Amount PCT Amount PCT --------------------------------------------------------------------------------------------------------- (2) 30-59 Days 159 21.1834% $43,~~511~~338,~~251~~108.7333 21.0152% $43,~~511~~338,~~251~~108.7333 21.0152% FIXED (2) 60-89 Days 24 0.2959% $~~747~~642,~~125~~149.0079 0.3329% $~~747~~642,~~125~~149.0079 0.3329% (2) 90 + Days 14 0.1559% $~~247~~1,~~300~~326,425.00 0.1161% $~~247~~1,~~300~~326,425.00 0.1161% REAL ESTATE OWNED BY THE TRUST 0 0.00% $0.00 0.00% $0.00 0.00% FORECLOSURES IN PROCESS 03 0.0045% $0994,425.00 0.0045% $0994,425.00 0.0045% BANKRUPTCIES IN PROCESS 01 0.0015% $0332,000.00 0.0015% $0332,000.00 0.0015% PURCHASE AMOUNT ADVANCES NA

(1) DETERMINED BY THE MBA METHOD. (2) DOES NOT INCLUDE REAL ESTATE OWNED BY THE TRUST. ------------------------------------------------------------------------------- 30 YR REG and 30 YR IO COLLATERAL INFORMATION: GENERAL INFORMATION: AT ISSUE BEGINNING ENDING WAC-SCHED BAL 6.61% 6.59% WAM 358 353 352 AVG LTV 72 72 72 AVG LOAN SIZE $296,063 $292,505 $291,879 # OF LOANS 1,638 1,590 1,581 ACTUAL BALANCE $484,951,084.31 $465,272,349.40 $461,644,189.77 SCHEDULED BALANCE $484,951,084.31 $465,082,826.24 $461,460,611.53 TYPE OF DWELLING UNIT: AT ISSUE CURRENT SNGL FAM DET 78% 78% 2-4 FAMILY 9% 9% TOWNHOUSE 3% 3% CONDOMINIUM 9% 9% COOPERATIVE 1% 1% GEOGRAPHIC DISTRIBUTION: LTV DISTRIBUTION: AT ISSUE CURRENT AT ISSUE CURRENT 65% AND BELOW 23% 22% CA 31% CA 30% 65.01-75% 25% 25% FL 7% FL 7% 75.01-80% 50% 51% NY 6% NY 7% OVER 80% 2% 2% IL 5% IL 5% NJ 5% NJ 5% OTHER 46% OTHER 46% PREPAYMENT INFORMATION: SCHEDULED PRINCIPAL: $234,938.89 PRINCIPAL PREPAYMENTS: $3,387,275.82 1 MONTH 3 MONTH 12 MONTH CUMULATIVE PRICING SPEED(CPR):See Prospectus PREPAYMENT HISTORY(PSA): 601% 840% 0% 985% PREPAYMENT HISTORY(CPR): 8.41% 10.09% 0.00% 8.92% DELINQUENCY (1)

--------------------------------------------------------------------------------------------------------- Number of Amount of Scheduled Amount of Actual Pool Item loans Balance Balance # PCT Amount PCT Amount PCT --------------------------------------------------------------------------------------------------------- (2) 30-59 Days 2016 1.2401% $56,~~830~~148,~~028~~539.0083 1.2333% $56,~~832~~153,~~373~~559.8816 1.2333% FIXED (2) 60-89 Days 45 0.2532% $1,~~456~~034,~~641~~731.0452 0.3122% $1,~~458~~035,~~234~~686.8274 0.3122% (2) 90 + Days 16 0.0638% $~~247~~2,~~300~~369,121.0087 0.0551% $~~247~~2,~~300~~373,247.0066 0.0551% REAL ESTATE OWNED BY THE TRUST 0 0.00% $0.00 0.00% $0.00 0.00% FORECLOSURES IN PROCESS 04 0.0025% $01,519,416.0021 0.0033% $01,522,002.0077 0.0033% BANKRUPTCIES IN PROCESS 12 0.0613% $~~223~~555,~~977~~416.2751 0.0512% $~~224~~555,~~161~~604.9556 0.0512% PURCHASE AMOUNT ADVANCES NA

(1) DETERMINED BY THE MBA METHOD. (2) DOES NOT INCLUDE REAL ESTATE OWNED BY THE TRUST. -------------------------------------------------------------------------------

Filing Compare · CMALT (CitiMortgage Alternative Loan Trust), Series 2007-A3