Exhibit 33.6

MANAGEMENTS ASSERTION OF COMPLIANCE

Management of the Agency and Trust division of Citibank, N.A. (or Company) is responsible for assessing compliance with the servicing criteria set
forth in Item 1122(d) of Regulation AB promulgated by the Securities and Exchange Commission.

Management has determined that the servicing criteria set
forth in Item 1122(d) of Regulation AB are applicable in regard to the servicing platform as of and for the period as follows:

Platform: Publicly-issued (i.e., transaction-level reporting initially required under the Securities Exchange Act of 1934, as
amended) and certain privately-issued (i.e., for which transaction-level reporting is required pursuant to contractual obligation) residential mortgage-backed securities issued on or after January 1, 2006, as listed in Appendix A, for
which the Company provides the following servicing functions:



| | ● |  | paying agent, securities administration and trustee; or
| | - |  | -------------------------------------------------------

| | ● |  | securities administration and paying agent; or
| | - |  | ----------------------------------------------

| | ● |  | paying agent and trustee; or
| | - |  | ----------------------------

| | ● |  | paying agent
| | - |  | ------------

The Platform also includes the transactions listed in Appendix B for which the Company is not a party to the transaction agreements, but for
which securities administration servicing functions have been outsourced to the Company by a party to the transaction agreements.

Applicable Servicing Criteria: All servicing criteria set forth in Item 1122(d), to the extent required by Item 1122(d) servicing
criteria in regards to the activities performed by the Company with respect to the Platform as to any transaction, except for the following servicing criteria: 1122(d)(1)(iii)-1122(d)(1)(iv), 1122(d)(2)(iii), 1122(d)(4)(i)-1122(d)(4)(ii) and
1122(d)(4)(iv)-1122(d)(4)(xiv), which management has determined are not applicable to the activities the Company performs with respect to the Platform (the Applicable Servicing Criteria). Servicing criterion 1122(d)(1)(v) is applicable
only to the activities the Company performs related to the mathematically accurate aggregation of information received from servicers and the accurate conveyance of such information within reports to investors. Servicing criterion 1122(d)(4)(iii) is
applicable to the activities the Company performs with respect to the Platform only as it relates to the Companys obligation to report additions, removals or substitutions on reports to investors in accordance with the transaction agreements.
With respect to servicing criterion 1122(d)(1)(ii), there were no activities performed during the twelve months ended December 31, 2018 with respect to the Platform, because there were no occurrences of events that would require the Company to
perform such activities.

Period: Twelve months ended December 31, 2018 (the Period).

With respect to the Platform as of and for the Period, the Companys management provides the following assertion of compliance with respect to the
Applicable Servicing Criteria:



| | ● |  | The Companys management is responsible for assessing the Companys compliance with the Applicable
Servicing Criteria.
| | - |  | ----------------------------------------------------------------------------------------------------------------------



| | ● |  | The Companys management has assessed compliance with the Applicable Servicing Criteria. In making this
assessment, management used the criteria set forth by the Securities and Exchange Commission in paragraph (d) of Item 1122 of Regulation AB.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | ● |  | Based on such assessment, the Company has complied, in all material respects, with the Applicable Servicing
Criteria.
| | - |  | ---------------------------------------------------------------------------------------------------------------------

KPMG LLP, an independent registered public accounting firm, has issued an attestation report with respect to
Managements assertion of compliance with the Applicable Servicing Criteria as of and for the Period.



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|               |  |                   
|-------------- |  | ------------------
|CITIBANK, N.A.
|               | 
|By:            |  | /s/ Karen Montbach
|               | 
|Its:           |  | Managing Director 

Dated: February 28, 2019



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Appendix A

Mortgage-backed Transactions and Securities Constituting the Platform



|                              |  |                                      |  |                            
|----------------------------- |  | ------------------------------------ |  | ---------------------------
|Deal Name                     |  | Deal Name                            |  | Deal Name                  
|AHMA 2006-3                   |  | CMLTI 2006-WFHE1                     |  | CMLTI07-AR7 Mtge pass-thru 
|American Home Mtge Assets06-4 |  | CMLTI 2006-WFHE3                     |  | CMLTI07-AR8, Mtge pass-thru
|BAFC 2007-6                   |  | CMLTI 2006-WFHE4                     |  | CMS 07-1                   
|CMALT 2006-A1                 |  | CMLTI 2006-WMC1                      |  | CMS 07-2                   
|CMALT 2006-A2                 |  | CMLTI 2007-10                        |  | CMS 07-3                   
|CMALT 2006-A3                 |  | CMLTI 2007-AHL1                      |  | CMSI 06-1                  
|CMALT 2006-A4                 |  | CMLTI 2007-AHL2                      |  | CMSI 06-2                  
|CMALT 2006-A5                 |  | CMLTI 2007-AMC1                      |  | CMSI 06-3                  
|CMALT 2006-A6                 |  | CMLTI 2007-AMC3                      |  | CMSI 06-4                  
|CMALT 2006-A7                 |  | CMLTI 2007-WFHE1                     |  | CMSI 06-5                  
|CMALT 2007-A1                 |  | CMLTI 2007-WFHE2                     |  | CMSI 06-6                  
|CMALT 2007-A2                 |  | CMLTI 2007-WFHE3                     |  | CMSI 06-7                  
|CMALT 2007-A3                 |  | CMLTI 2007-WFHE4                     |  | CMSI 07-4                  
|CMALT 2007-A4                 |  | CMLTI 2008-2                         |  | CMSI 07-5                  
|CMALT 2007-A5                 |  | CMLTI HELOC Tr, 06-NCB1              |  | CMSI 07-6                  
|CMALT 2007-A6                 |  | CMLTI06-4 Mtge pass-thru             |  | CMSI 07-7                  
|CMALT 2007-A7                 |  | CMLTI06-AR1 MBNts                    |  | CMSI 07-8                  
|CMALT 2007-A8                 |  | CMLTI06-AR2 MBCerts                  |  | CMSI 07-9                  
|CMLTI 2006-WFHE2              |  | CMLTI06-AR3 Mtge pass-thru           |  | CMSI 2008-1                
|CMLTI 07-AHL3                 |  | CMLTI06-AR5 Mtge pass-thru           |  | CMSI 2008-2                
|CMLTI 2006-AMC1               |  | CMLTI06-AR6 Mtge Pass -Through Certs |  | CRMSI 2006-1               
|CMLTI 2006-HE1                |  | CMLTI06-AR7 Mtge pass-thru           |  | CRMSI 2006-2               
|CMLTI 2006-HE2                |  | CMLTI06-AR9 Mtge pass-thru           |  | CRMSI 2006-3               
|CMLTI 2006-HE3                |  | CMLTI-07-2 Mtge Pass Thru Cert       |  | CRMSI 2007-1               
|CMLTI 2006-NC1                |  | CMLTI07-6, Mtge pass-thru            |  | CRMSI 2007-2               
|CMLTI 2006-NC2                |  | CMLTI07-AR1 Mtge pass-thru           |  | CSMC Trust 2012-9          
|CMLTI 2006-WF1                |  | CMLTI07-AR4 Mtge pass-thru           |  | HALO 07-1                  
|CMLTI 2006-WF2                |  | CMLTI07-AR5 Mtge pass-thru           |  | HALO 2006-2                



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|                                     |  |                            |  |              
|------------------------------------ |  | -------------------------- |  | -------------
|Deal Name                            |  | Deal Name                  |  | Deal Name    
|HALO 2007-AR1                        |  | SASCO Mtge pass-thru,06-S4 |  | SEMT 2016-1  
|HALO 2007-WF1                        |  | SASCO Mtge pass-thru06-S3  |  | SEMT 2016-2  
|HASCO 06-HE2 HSI Asset Secu Tr06-HE2 |  | SEMT 2012-1                |  | SEMT 2016-3  
|HASCO07-OPT1 Mtge pass-thru          |  | SEMT 2012-2                |  | SEMT 2017-1  
|LMT 2006-1                           |  | SEMT 2012-3                |  | SEMT 2017-2  
|LMT 2006-3                           |  | SEMT 2012-4                |  | SEMT 2017-3  
|LMT 2006-4                           |  | SEMT 2012-5                |  | SEMT 2017-4  
|LXS 2007-11                          |  | SEMT 2012-6                |  | SEMT 2017-5  
|PHH Mtge 2006-1 RMBS                 |  | SEMT 2013-1                |  | SEMT 2017-6  
|PHH Mtge 2006-2 RMBS                 |  | SEMT 2013-10               |  | SEMT 2017-7  
|PHH Mtge 2006-3 RMBS                 |  | SEMT 2013-11               |  | SEMT 2017-CH1
|PHH Mtge 2006-4 RMBS                 |  | SEMT 2013-12               |  | SEMT 2017-CH2
|PHH Mtge 2007-1 RMBS                 |  | SEMT 2013-2                |  | SEMT 2018-1  
|PHH Mtge 2007-2 RMBS                 |  | SEMT 2013-3                |  | SEMT 2018-2  
|PHH Mtge 2007-3 RMBS                 |  | SEMT 2013-4                |  | SEMT 2018-3  
|PHH Mtge 2007-4 RMBS                 |  | SEMT 2013-6                |  | SEMT 2018-4  
|PHH Mtge 2007-5 RMBS                 |  | SEMT 2013-7                |  | SEMT 2018-5  
|PHH Mtge 2007-6 RMBS                 |  | SEMT 2013-8                |  | SEMT 2018-6  
|PMT 2013-J1                          |  | SEMT 2013-9                |  | SEMT 2018-7  
|SASCO BNC 07-3                       |  | SEMT 2014-1                |  | SEMT 2018-8  
|SASCO Lehman XS 2006-1               |  | SEMT 2014-2                |  | SEMT 2018-CH1
|SASCO Lehman XS 2006-13              |  | SEMT 2014-3                |  | SEMT 2018-CH2
|SASCO Lehman XS 2006-17              |  | SEMT 2014-4                |  | SEMT 2018-CH3
|SASCO Lehman XS 2006-5               |  | SEMT 2015-1                |  | SEMT 2018-CH4
|SASCO Lehman XS 2006-7               |  | SEMT 2015-2                |  | WAMU 2007-HE2
|SASCO Lehman XS 2006-9               |  | SEMT 2015-3                |  | WAMU 2007-HE3
|SASCO Mtge pass-thru,06-3H           |  | SEMT 2015-4                |  | WAMU 2007-HE4
|SASCO Mtge pass-thru,06-S2           |  |                           



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Appendix B

Mortgage-backed Transactions and Securities Constituting the Platform1

Deal Name

RALI06QH1

RALI06QO1

RALI06QO10

RALI06QO2

RALI06QO3

RALI06QO4

RALI06QO5

RALI06QO6

RALI06QO7

RALI06QO8

RALI06QO9

RALI07QH1

RALI07QH2

RALI07QH3

RALI07QH4

RALI07QH5

RALI07QH6

RALI07QH7

RALI07QH8

RALI07QH9

RALI07QO1

RALI07QO2

RALI07QO3

RALI07QO4

RALI07QO5

1The transactions listed consist of certain transactions for which the Company is not a party to the
transaction agreements, but for which securities administration servicing functions have been outsourced to the Company by a party to the transaction agreements with respect to servicing criteria 1122(d)(1)(v), 1122(d)(3)(i)(A), 1122(d)(3)(i)(B) and
1122(d)(3)(i)(D), as well as 1122(d)(3)(ii), but only as it relates to the allocation of amounts due to investors in accordance with the distribution priority and other terms set forth in the transaction agreements.