EX-31 Rule 13a-14(d)/15d-14(d) Certification.

  Re: CWCapital Commercial Funding Corp., COBALT CMBS Commercial Mortgage
  Trust 2007-C3 (the "Trust"), Commercial Mortgage Pass-Through
  Certificates, Series 2007-C3, issued pursuant to the Pooling and
  Servicing Agreement, dated as of August 1, 2007 (the "Pooling and
  Servicing Agreement"), among CWCapital Commercial Funding Corp., as
  Depositor, Wachovia Bank, National Association, as Master Servicer,
  CWCapital Asset Management LLC, as Special Servicer, and Wells Fargo Bank,
   N.A., as Trustee

  Capitalized terms used but not defined herein have the meanings set forth in
  the Pooling and Servicing Agreement.

  I, Tammy Heyman, the senior officer in charge of securitization of the
  Depositor into the above-referenced Trust, certify that:

  1.I have reviewed this report on Form 10-K and all reports on Form 10-D
    required to be filed in respect of the period covered by this report on
    Form 10-K of the Trust (the "Exchange Act Periodic Reports");

  2.Based on my knowledge, the Exchange Act Periodic Reports, taken as a
    whole, do not contain any untrue statement of a material fact or omit
    to state a material fact necessary to make the statements made, in
    light of the circumstances under which such statements were made, not
    misleading with respect to the period covered by this report;

  3.Based on my knowledge, all distribution, servicing and other
    information required to be provided under Form 10-D for the period
    covered by this report is included in the Exchange Act Periodic Reports;

  4.Based on my knowledge and the servicer compliance statements required
    in this report under Item 1123 of Regulation AB, and except as
    disclosed in the Exchange Act Periodic Reports, the Master Servicer,
    the Special Servicer and the Reporting Sub-Servicers have fulfilled
    their obligations under the Pooling and Servicing Agreement or the
    applicable sub-servicing agreement or primary servicing agreement in
    all material respects; and

  5.All of the reports on assessment of compliance with servicing criteria
    for asset-backed securities and their related attestation reports on
    assessment of compliance with servicing criteria for asset-backed
    securities required to be included in this report in accordance with
    Item 1122 of Regulation AB and Exchange Act Rules 13a-18 and 15d-18
    have been included as an exhibit to this report, except as otherwise
    disclosed in this report. Any material instances of noncompliance
    described in such reports have been disclosed in this report on Form
    10-K.

    In giving the certifications above, I have reasonably relied on
    information provided to me by the following unaffiliated parties: First
    American Commercial Real Estate Services, Inc. as servicing function
    participant to Wachovia Bank, National Association, Global Realty
    Outsourcing, Inc. as servicing function participant to Wachovia Bank,
    National Association, Wachovia Bank, National Association as master
    servicer, Wells Fargo Bank, N.A. as trustee and Wells Fargo Bank, N.A.
    as custodian.

    Dated:   March 27, 2008


    /s/ Tammy Heyman
    Signature

    Senior Vice President
    (senior officer in charge of securitization of the Depositor)