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





I,
Anthony Sfarra, 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
Wells Fargo Commercial Mortgage Trust 2017-C39 (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 of the 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 servicers have fulfilled their obligations
under the servicing agreements 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:



Argentic
Services Company LP, as Special Servicer, Wilmington Trust, National Association,
as Trustee, BellOak, LLC. as Operating Advisor, CoreLogic Solutions, LLC, as
Servicing Function Participant, Computershare Trust Company, National
Association, as Servicing Function Participant for the Certificate
Administrator, Computershare Trust Company, National Association, as Servicing
Function Participant for the Custodian, Situs Holdings, LLC, as Special
Servicer for the 245 Park Avenue Mortgage Loan, Wilmington Trust, National
Association, as Trustee for the 245 Park Avenue Mortgage Loan, BellOak, LLC, as
Operating Advisor for the 245 Park Avenue Mortgage Loan, CoreLogic Solutions,
LLC, as Servicing Function Participant for the 245 Park Avenue Mortgage Loan,
Computershare Trust Company, National Association, as Servicing Function
Participant for the Custodian for the 245 Park Avenue Mortgage Loan, Midland
Loan Services, a Division of PNC Bank, National Association, as Primary
Servicer for the iStar Leased Fee Portfolio Mortgage Loan, Argentic Services
Company LP, as Special Servicer for the iStar Leased Fee Portfolio Mortgage
Loan, BellOak, LLC, as Operating Advisor for the iStar Leased Fee Portfolio
Mortgage Loan, Computershare Trust Company, National Association, as Servicing
Function Participant for the Custodian for the iStar Leased Fee Portfolio
Mortgage Loan, Midland Loan Services, a Division of PNC Bank, National
Association, as Primary Servicer for the Yeshiva University Portfolio Mortgage
Loan, Argentic Services Company LP, as Special Servicer for the Yeshiva
University Portfolio Mortgage Loan, BellOak, LLC, as Operating Advisor for the
Yeshiva University Portfolio Mortgage Loan, Computershare Trust Company,
National Association, as Servicing Function Participant for the Custodian for
the Yeshiva University Portfolio Mortgage Loan, KeyBank National Association,
as Primary Servicer for the Del Amo Fashion Center Mortgage Loan, Situs
Holdings, LLC, successor to Cohen Financial, a Division of Truist Bank,
successor by merger to SunTrust Bank, as Special Servicer for the Del Amo
Fashion Center Mortgage Loan, Wilmington Trust, National Association, as
Trustee for the Del Amo Fashion Center Mortgage Loan, Park Bridge Lender
Services LLC, as Operating Advisor for the Del Amo Fashion Center Mortgage
Loan, Computershare Trust Company, National Association, as Servicing Function
Participant for the Custodian for the Del Amo Fashion Center Mortgage Loan, LNR
Partners, LLC, as Special Servicer for the Marble Hall Gardens Mortgage Loan,
Wilmington Trust, National Association, as Trustee for the Marble Hall Gardens
Mortgage Loan, Park Bridge Lender Services LLC, as Operating Advisor for the
Marble Hall Gardens Mortgage Loan, CoreLogic Solutions, LLC, as Servicing
Function Participant for the Marble Hall Gardens Mortgage Loan, Computershare
Trust Company, National Association, as Servicing Function Participant for the
Custodian for the Marble Hall Gardens Mortgage Loan, Midland Loan Services, a
Division of PNC Bank, National Association, as Primary Servicer for the
Starwood Capital Group Hotel Portfolio Mortgage Loan, Midland Loan Services, a
Division of PNC Bank, National Association, as Special Servicer for the
Starwood Capital Group Hotel Portfolio Mortgage Loan prior to May 5, 2023,
K-Star Asset Management LLC, as Special Servicer for the Starwood Capital Group
Hotel Portfolio Mortgage Loan prior to May 5, 2023, Pentalpha Surveillance LLC,
as Operating Advisor for the Starwood Capital Group Hotel Portfolio Mortgage
Loan, Computershare Trust Company, National Association, as Servicing Function
Participant for the Custodian for the Starwood Capital Group Hotel Portfolio
Mortgage Loan, CWCapital Asset Management LLC, as Special Servicer for the
First Stamford Place Mortgage Loan, Wilmington Trust, National Association, as
Trustee for the First Stamford Place Mortgage Loan, Pentalpha Surveillance LLC,
as Operating Advisor for the First Stamford Place Mortgage Loan, CoreLogic
Solutions, LLC, as Servicing Function Participant for the First Stamford Place
Mortgage Loan, Computershare Trust Company, National Association, as Servicing
Function Participant for the Custodian for the First Stamford Place Mortgage
Loan, Rialto Capital Advisors, LLC, as Special Servicer for the Long Island
Prime Portfolio - Uniondale Mortgage Loan, Wilmington Trust, National
Association, as Trustee for the Long Island Prime Portfolio - Uniondale
Mortgage Loan, Park Bridge Lender Services LLC, as Operating Advisor for the
Long Island Prime Portfolio - Uniondale Mortgage Loan, CoreLogic Solutions,
LLC, as Servicing Function Participant for the Long Island Prime Portfolio -
Uniondale Mortgage Loan, Computershare Trust Company, National Association, as
Servicing Function Participant for the Custodian for the Long Island Prime
Portfolio – Uniondale Mortgage Loan, LNR Partners, LLC, as Special Servicer for
the Lakeside Shopping Center Mortgage Loan, Deutsche Bank Trust Company
Americas, as Trustee for the Lakeside Shopping Center Mortgage Loan, Deutsche
Bank Trust Company Americas, as Custodian for the Lakeside Shopping Center
Mortgage Loan, BellOak, LLC, as Operating Advisor for the Lakeside Shopping
Center Mortgage Loan, CoreLogic Solutions, LLC, as Servicing Function
Participant for the Lakeside Shopping Center Mortgage Loan, Rialto Capital
Advisors, LLC, as Special Servicer for the University Center Chicago Mortgage
Loan, Wilmington Trust, National Association, as Trustee for the University
Center Chicago Mortgage Loan, Pentalpha Surveillance LLC, as Operating Advisor
for the University Center Chicago Mortgage Loan, CoreLogic Solutions, LLC, as Servicing
Function Participant for the University Center Chicago Mortgage Loan,
Computershare Trust Company, National Association, as Servicing Function
Participant for the Custodian for the University Center Chicago Mortgage Loan,
Greystone Servicing Company LLC (as successor to C-III Asset Management LLC),
as Special Servicer for the Hilton Garden Inn Chicago/North Loop Mortgage Loan,
Wilmington Trust, National Association, as Trustee for the Hilton Garden Inn
Chicago/North Loop Mortgage Loan, Pentalpha Surveillance LLC, as Operating
Advisor for the Hilton Garden Inn Chicago/North Loop Mortgage Loan, CoreLogic
Solutions, LLC, as Servicing Function Participant for the Hilton Garden Inn
Chicago/North Loop Mortgage Loan, and Computershare Trust Company, National
Association, as Servicing Function Participant for the Custodian for the Hilton
Garden Inn Chicago/North Loop Mortgage Loan.





Dated: March 12, 2024





/s/
Anthony Sfarra

Anthony
Sfarra

President

(senior
officer in charge of securitization of the depositor)