10-D 1 csc07c01_10d-200704.txt 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: March 17, 2007 to April 17, 2007 Commission File Number of issuing entity: 333-137192-02 Credit Suisse Commercial Mortgage Trust Series 2007-C1 (Exact name of issuing entity as specified in its charter) Commission File Number of depositor: 333-137192 Credit Suisse First Boston Mortgage Securities Corp. (Exact name of depositor as specified in its charter) Column Financial, Inc. Capmark Finance, Inc. (Exact name of sponsors as specified in its charter) New York (State or other jurisdiction of incorporation or organization of the issuing entity) 54-2199267 54-2199268 54-6740331 (I.R.S. Employer Identification No.) c/o Wells Fargo Bank, N.A. 9062 Old Annapolis Road Columbia, MD 21045 (Address of principal executive offices of the issuing entity) (Zip Code) (410) 884-2000 (Telephone number, including area code) Not Applicable (Former name, former address, if changed since last report) Registered/reporting pursuant to (check one) Title of Section Section Section Name of Exchange Class 12(b) 12(g) 15(d) (If Section 12(b)) A-1 ______ ______ ___X___ ___________ A-2 ______ ______ ___X___ ___________ A-AB ______ ______ ___X___ ___________ A-3 ______ ______ ___X___ ___________ A-1A ______ ______ ___X___ ___________ A-MFL ______ ______ ___X___ ___________ A-M ______ ______ ___X___ ___________ A-J ______ ______ ___X___ ___________ B ______ ______ ___X___ ___________ C ______ ______ ___X___ ___________ D ______ ______ ___X___ ___________ E ______ ______ ___X___ ___________ F ______ ______ ___X___ ___________ G ______ ______ ___X___ ___________ H ______ ______ ___X___ ___________ J ______ ______ ___X___ ___________ K ______ ______ ___X___ ___________ L ______ ______ ___X___ ___________ M ______ ______ ___X___ ___________ N ______ ______ ___X___ ___________ O ______ ______ ___X___ ___________ P ______ ______ ___X___ ___________ Q ______ ______ ___X___ ___________ S ______ ______ ___X___ ___________ T ______ ______ ___X___ ___________ R ______ ______ ___X___ ___________ LR ______ ______ ___X___ ___________ V ______ ______ ___X___ ___________ A-X ______ ______ ___X___ ___________ A-SP ______ ______ ___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 ____ Part I - DISTRIBUTION INFORMATION Item 1. Distribution and Pool Performance Information On April 17, 2007 a distribution was made to holders of Credit Suisse Commercial Mortgage Trust Series 2007-C1. The distribution report is attached as an Exhibit to this Form 10-D, please see Item 9(b), Exhibit 99.1 for the related information. Part II - OTHER INFORMATION Item 9. Exhibits. (a) The following is a list of documents filed as part of this Report on Form 10-D: (99.1) Monthly report distributed to holders of Credit Suisse Commercial Mortgage Trust Series 2007-C1, relating to the April 17, 2007 distribution. (b) The exhibits required to be filed by the Registrant pursuant to this Form are listed above and in the Exhibit Index that immediately follows the signature page hereof. 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. Credit Suisse First Boston Mortgage Securities Corp. (Depositor) /s/ Jeffrey A. Altabef Jeffrey A. Altabef, Vice President Date: April 23, 2007 EXHIBIT INDEX Exhibit Number Description EX-99.1 Monthly report distributed to holders of Credit Suisse Commercial Mortgage Trust Series 2007-C1, relating to the April 17, 2007 distribution. EX-99.1 Wells Fargo Bank, N.A. Corporate Trust Services 9062 Old Annapolis Road Columbia, MD 21045-1951 Credit Suisse Commercial Mortgage Trust Commercial Mortgage Pass-Through Certificates Series 2007-C1 For Additional Information, please contact CTSLink Customer Service (301) 815-6600 Reports Available @ www.ctslink.com/cmbs Payment Date: April 17, 2007 Record Date: March 30, 2007 Determination Date: April 11, 2007 DISTRIBUTION DATE STATEMENT Table of Contents STATEMENT SECTIONS PAGE(s) Certificate Distribution Detail 2 Certificate Factor Detail 3 Reconciliation Detail 4 Other Required Information 5 Cash Reconciliation 6 Ratings Detail 7 Current Mortgage Loan and Property Stratification Tables 8 - 16 Mortgage Loan Detail 17 - 24 NOI Detail 25 - 32 Principal Prepayment Detail 33 Historical Detail 34 Delinquency Loan Detail 35 Specially Serviced Loan Detail 36 - 37 Advance Summary 38 Modified Loan Detail 39 Historical Liquidated Loan Detail 40 Historical Bond/Collateral Loss Reconciliation Detail 41 Interest Shortfall Reconciliation Detail 42 - 43 Depositor Credit Suisse First Boston Mortgage Securities Corp. 11 Madison Avenue, 5th Floor New York, NY 10010 Contact: General Information Number Phone Number: (212) 325-2000 Master Servicer Capmark Finance Inc. 116 Welsh Road Horsham, PA 19044-8015 Contact: Darri Cunningham Phone Number: (215) 328-1784 Special Servicer Midland Loan Services, Inc. 10851 Mastin Street, Building 82 Overland Park, KS 66210 Contact: Brad Hauger Phone Number: (913) 253-9000 This report has been compiled from information provided to Wells Fargo Bank, N.A. by various third parties, which may include the Servicer, Master Servicer, Special Servicer and others. Wells Fargo Bank, N.A. has not independently confirmed the accuracy of information received from these third parties and assumes no duty to do so. Wells Fargo Bank, N.A. expressly disclaims any responsibility for the accuracy or completeness of information furnished by third parties. Copyright 2007, Wells Fargo Bank, N.A.

Appraisal Reduction Amount None Cash Reconciliation Detail Total Funds Collected Interest: Scheduled Interest 17,074,809.99 Interest reductions due to Nonrecoverability Determinations 0.00 Interest Adjustments 0.00 Deferred Interest 0.00 Net Prepayment Interest Shortfall 0.00 Net Prepayment Interest Excess 0.00 Extension Interest 0.00 Interest Reserve Withdrawal 0.00 Total Interest Collected 17,074,809.99 Principal: Scheduled Principal 550,992.53 Unscheduled Principal 0.00 Principal Prepayments 0.00 Collection of Principal after Maturity Date 0.00 Recoveries from Liquidation and Insurance Proceeds 0.00 Excess of Prior Principal Amounts paid 0.00 Curtailments 0.00 Negative Amortization 0.00 Principal Adjustments 0.00 Total Principal Collected 550,992.53 Other: Prepayment Penalties/Yield Maintenance 0.00 Repayment Fees 0.00 Borrower Option Extension Fees 0.00 Equity Payments Received 0.00 Net Swap Counterparty Payments Received 48,055.56 Total Other Collected: 48,055.56 Total Funds Collected 17,673,858.08 Total Funds Distributed Fees: Master Servicing Fee 111,716.98 Trustee Fee 1,915.89 Certificate Administration Fee 0.00 Insurer Fee 0.00 Miscellaneous Fee 0.00 Total Fees 113,632.87 Additional Trust Fund Expenses: Reimbursement for Interest on Advances 0.00 ASER Amount 0.00 Special Servicing Fee 0.00 Rating Agency Expenses 0.00 Attorney Fees & Expenses 0.00 Bankruptcy Expense 0.00 Taxes Imposed on Trust Fund 0.00 Non-Recoverable Advances 0.00 Other Expenses 0.00 Total Additional Trust Fund Expenses 0.00 Interest Reserve Deposit 0.00 Payments to Certificateholders & Others: Interest Distribution 17,009,232.44 Principal Distribution 550,992.53 Prepayment Penalties/Yield Maintenance 0.00 Borrower Option Extension Fees 0.00 Equity Payments Paid 0.00 Net Swap Counterparty Payments Paid 0.00 Total Payments to Certificateholders & Others 17,560,224.97 Total Funds Distributed 17,673,857.84

CREDIT SUISSE COMMERCIAL MORTGAGE TRUST, SERIES 2007-C1 10-D