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 certain 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 to the activities the Company performs with respect to the Platform for all transactions in the Platform, including those issued on or before November 23, 2015 for which compliance was previously assessed under other servicing
criteria in accordance with the SEC Division of Corporation Finances Manual of Publicly Available Interpretations on Regulation AB and Related Rules, Interpretation 11.03, as applicable, as of and for the twelve months ended
December 31, 2015; provided further that, Management has determined that 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, 2015 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, 2015 (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.



CITIBANK, N.A.By:

/s/ Karen MontbachIts:

Managing Director


Dated: February 26, 2016



---

Appendix A

Mortgage-backed Transactions and Securities Constituting the Platform



|                 |  |                       |  |               
|---------------- |  | --------------------- |  | --------------
|Deal Name        |  | Deal Name             |  | Deal Name     
|                 |  |                      
|AHMA 2006-3      |  | CMLTI 2006-NC2        |  | CMLTI 2006-AR9
|                 |  |                      
|AHMA 2006-4      |  | CMLTI 2006-WF1        |  | CMLTI 2007-2  
|                 |  |                      
|BAFC 2007-6      |  | CMLTI 2006-WF2        |  | CMLTI 2007-6  
|                 |  |                      
|CMALT 2006-A1    |  | CMLTI 2006-WFHE1      |  | CMLTI 2007-AR1
|                 |  |                      
|CMALT 2006-A2    |  | CMLTI 2006-WFHE3      |  | CMLTI 2007-AR4
|                 |  |                      
|CMALT 2006-A3    |  | CMLTI 2006-WFHE4      |  | CMLTI 2007-AR5
|                 |  |                      
|CMALT 2006-A4    |  | CMLTI 2006-WMC1       |  | CMLTI 2007-AR7
|                 |  |                      
|CMALT 2006-A5    |  | CMLTI 2007-10         |  | CMLTI 2007-AR8
|                 |  |                      
|CMALT 2006-A6    |  | CMLTI 2007-AHL1       |  | CMS 2007-1    
|                 |  |                      
|CMALT 2006-A7    |  | CMLTI 2007-AHL2       |  | CMS 2007-2    
|                 |  |                      
|CMALT 2007-A1    |  | CMLTI 2007-AMC1       |  | CMS 2007-3    
|                 |  |                      
|CMALT 2007-A2    |  | CMLTI 2007-AMC3       |  | CMSI 2006-1   
|                 |  |                      
|CMALT 2007-A3    |  | CMLTI 2007-WFHE1      |  | CMSI 2006-2   
|                 |  |                      
|CMALT 2007-A4    |  | CMLTI 2007-WFHE2      |  | CMSI 2006-3   
|                 |  |                      
|CMALT 2007-A5    |  | CMLTI 2007-WFHE3      |  | CMSI 2006-4   
|                 |  |                      
|CMALT 2007-A6    |  | CMLTI 2007-WFHE4      |  | CMSI 2006-5   
|                 |  |                      
|CMALT 2007-A7    |  | CMLTI 2008-2          |  | CMSI 2006-6   
|                 |  |                      
|CMALT 2007-A8    |  | CMLTI HELOC 2006-NCB1 |  | CMSI 2006-7   
|                 |  |                      
|CMLTI 2006-WFHE2 |  | CMLTI 2006-4          |  | CMSI 2007-4   
|                 |  |                      
|CMLTI 2007-AHL3  |  | CMLTI 2006-AR1        |  | CMSI 2007-5   
|                 |  |                      
|CMLTI 2006-AMC1  |  | CMLTI 2006-AR2        |  | CMSI 2007-6   
|                 |  |                      
|CMLTI 2006-HE1   |  | CMLTI 2006-AR3        |  | CMSI 2007-7   
|                 |  |                      
|CMLTI 2006-HE2   |  | CMLTI 2006-AR5        |  | CMSI 2007-8   
|                 |  |                      
|CMLTI 2006-HE3   |  | CMLTI 2006-AR6        |  | CMSI 2007-9   
|                 |  |                      
|CMLTI 2006-NC1   |  | CMLTI 2006-AR7        |  | CMSI 2008-1   



---

|                     |  |                         |  |           |             | 
|-------------------- |  | ----------------------- |  | --------- | ----------- | 
|Deal Name            |  | Deal Name               |  | Deal Name |            
|                     |  |                        
|CMSI 2008-2          |  | PHH Mtge 2007-4 RMBS    |  |           | SEMT 2012-1 | 
|                     |  |                        
|CRMSI 2006-1         |  | PHH Mtge 2007-5 RMBS    |  |           | SEMT 2012-2 | 
|                     |  |                        
|CRMSI 2006-2         |  | PHH Mtge 2007-6 RMBS    |  |           | SEMT 2012-3 | 
|                     |  |                        
|CRMSI 2006-3         |  | PMT 2013-J1             |  |           | SEMT 2012-4 | 
|                     |  |                        
|CRMSI 2007-1         |  | SASCO BNC 07-3          |  |           | SEMT 2012-5 | 
|                     |  |                        
|CRMSI 2007-2         |  | SASCO Lehman XS 2006-13 |  |           | SEMT 2012-6 | 
|                     |  |                        
|CSMC Trust 2012-9    |  | SASCO Lehman XS 2006-17 |  |           | SEMT 2013-1 | 
|                     |  |                        
|HALO 2007-1          |  | SASCO Lehman XS 2006-5  |  |           | SEMT 2013-2 | 
|                     |  |                        
|HALO 2006-2          |  | SASCO Lehman XS 2006-9  |  |           | SEMT 2013-3 | 
|                     |  |                        
|HALO 2007-AR1        |  | SASCO Lehman XS 2006-7  |  |           | SEMT 2013-4 | 
|                     |  |                        
|HALO 2007-WF1        |  | SASCO 2006-3H           |  |           | SEMT 2013-6 | 
|                     |  |                        
|HASCO 2006-HE2       |  | SASCO 2006-S2           |  |           | SEMT 2013-7 | 
|                     |  |                        
|HASCO 2007-OPT1      |  | SASCO 2006-S4           |  |           | SEMT 2014-1 | 
|                     |  |                        
|LMT 2006-1           |  | SASCO 2006-S3           |  |           | SEMT 2014-2 | 
|                     |  |                        
|LMT 2006-3           |  | SEMT 2013-8             |  |           | SEMT 2014-3 | 
|                     |  |                        
|LMT 2006-4           |  | SEMT 2013-9             |  |           | SEMT 2014-4 | 
|                     |  |                        
|LXS 2006-1           |  | SEMT 2013-10            |  |           | SEMT 2015-1 | 
|                     |  |                        
|LXS 2007-11          |  | SEMT 2013-11            |  |           | SEMT 2015-2 | 
|                     |  |                        
|PHH Mtge 2006-1 RMBS |  | SEMT 2013-12            |  |           | SEMT 2015-3 | 
|                     |  |                        
|PHH Mtge 2006-2 RMBS |  | WAMU 2007-HE2           |  |           | SEMT 2015-4 | 
|                     |  |                        
|PHH Mtge 2006-3 RMBS |  | WAMU 2007-HE3           |  |           |             | 
|                     |  |                        
|PHH Mtge 2006-4 RMBS |  | WAMU 2007-HE4           |  |           |             | 
|                     |  |                        
|PHH Mtge 2007-1 RMBS |  | SEMT 2010-H1            |  |           |             | 
|                     |  |                        
|PHH Mtge 2007-2 RMBS |  | SEMT 2011-1             |  |           |             | 
|                     |  |                        
|PHH Mtge 2007-3 RMBS |  | SEMT 2011-2             |  |           |             | 



---

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



|1 | The 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.
|- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------