**President**

**Form            N-CSR Certification under Sarbanes Oxley Act**

 

 

 

I,            Michael G. Clark, certify that:

 

| 1. | I have reviewed this report, filed on behalf of NY Tax                            Free Money Fund and Tax Free Money Fund Investment, each a series of DWS                            Advisor Funds, on Form N-CSR; |
|----|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

             

| 2. | Based on my knowledge, this report does 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, the financial statements, and                            other financial information included in this report, fairly present in                            all material respects the financial condition, results of operations,                            changes in net assets, and cash flows (if the financial statements are                            required to include a statement of cash flows) of the registrant as of,                            and for, the periods presented in this report; |
|----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

             

| 4. | The registrant's other certifying officer(s) and I are                            responsible for establishing and maintaining disclosure controls and                            procedures (as defined in Rule 30a-3(c) under the Investment Company                            Act of 1940) and internal control over financial reporting (as defined                            in Rule 30a-3(d) under the Investment Company Act of 1940) for the                            registrant and have: |
|----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

 

|   | (a) | Designed such disclosure controls and procedures, or                            caused such disclosure controls and procedures to be designed under our                            supervision, to ensure that material information relating to the                            registrant, including its consolidated subsidiaries, is made known to                            us by others within those entities, particularly during the period in                            which this report is being prepared; |
|--------|-----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

             

|   | (b) | Designed such internal control over financial reporting,                            or caused such internal control over financial reporting to be designed                            under our supervision, to provide reasonable assurance regarding the                            reliability of financial reporting and the preparation of financial                            statements for external purposes in accordance with generally accepted                            accounting principles; |
|--------|-----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

             

|   | (c) | Evaluated the effectiveness of the registrant's                            disclosure controls and procedures and presented in this report our                            conclusions about the effectiveness of the disclosure controls and                            procedures, as of a date within 90 days prior to the filing date of                            this report based on such evaluation; and |
|--------|-----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

 

|   | (d) | Disclosed in this report any change in the registrant's                            internal control over financial reporting that occurred during the                            second fiscal quarter of the period covered by this report that has                            materially affected, or is reasonably likely to materially affect, the                            registrant's internal control over financial reporting; and |
|--------|-----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

 

| 5. | The registrant's other certifying officer(s) and I have                            disclosed to the registrant's auditors and the audit committee of the                            registrant's board of directors (or persons performing the equivalent                            functions): |
|----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

 

|   | (a) | All significant deficiencies and material weaknesses in                            the design or operation of internal control over financial reporting                            which are reasonably likely to adversely affect the registrant's                            ability to record, process, summarize, and report financial                            information; and |
|--------|-----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

 

|   | (b) | Any fraud, whether or not material, that involves                            management or other employees who have a significant role in the                            registrant's internal control over financial reporting. |
|--------|-----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

 

| March 2, 2009 | /s/Michael G. Clark                                                                                                      |
|---------------|--------------------------------------------------------------------------------------------------------------------------|
|          | Michael G. Clark                                                                                                         |
|          | President                                                                                                                |
|          | NY Tax Free Money Fund and Tax Free Money Fund                            Investment, each a series of DWS Advisor Funds |

 

 

 

 

 

**Chief Financial Officer and Treasurer**

**Form            N-CSR Certification under Sarbanes Oxley Act**

 

 

 

I, Paul            Schubert, certify that:

 

| 1. | I have reviewed this report, filed on behalf of NY Tax                            Free Money Fund and Tax Free Money Fund Investment, each a series of DWS                            Advisor Funds, on Form N-CSR; |
|----|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

             

| 2. | Based on my knowledge, this report does 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, the financial statements, and                            other financial information included in this report, fairly present in                            all material respects the financial condition, results of operations,                            changes in net assets, and cash flows (if the financial statements are                            required to include a statement of cash flows) of the registrant as of,                            and for, the periods presented in this report; |
|----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

             

| 4. | The registrant's other certifying officer(s) and I are                            responsible for establishing and maintaining disclosure controls and                            procedures (as defined in Rule 30a-3(c) under the Investment Company                            Act of 1940) and internal control over financial reporting (as defined                            in Rule 30a-3(d) under the Investment Company Act of 1940) for the                            registrant and have: |
|----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

 

|   | (a) | Designed such disclosure controls and procedures, or                            caused such disclosure controls and procedures to be designed under our                            supervision, to ensure that material information relating to the                            registrant, including its consolidated subsidiaries, is made known to                            us by others within those entities, particularly during the period in                            which this report is being prepared; |
|--------|-----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

             

|   | (b) | Designed such internal control over financial reporting,                            or caused such internal control over financial reporting to be designed                            under our supervision, to provide reasonable assurance regarding the                            reliability of financial reporting and the preparation of financial                            statements for external purposes in accordance with generally accepted                            accounting principles; |
|--------|-----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

             

|   | (c) | Evaluated the effectiveness of the registrant's                            disclosure controls and procedures and presented in this report our                            conclusions about the effectiveness of the disclosure controls and                            procedures, as of a date within 90 days prior to the filing date of                            this report based on such evaluation; and |
|--------|-----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

 

|   | (d) | Disclosed in this report any change in the registrant's                            internal control over financial reporting that occurred during the                            second fiscal quarter of the period covered by this report that has                            materially affected, or is reasonably likely to materially affect, the                            registrant's internal control over financial reporting; and |
|--------|-----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

 

| 5. | The registrant's other certifying officer(s) and I have                            disclosed to the registrant's auditors and the audit committee of the                            registrant's board of directors (or persons performing the equivalent                            functions): |
|----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

 

|   | (a) | All significant deficiencies and material weaknesses in                            the design or operation of internal control over financial reporting                            which are reasonably likely to adversely affect the registrant's                            ability to record, process, summarize, and report financial                            information; and |
|--------|-----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

             

|   | (b) | Any fraud, whether or not material, that involves                            management or other employees who have a significant role in the                            registrant's internal control over financial reporting. |
|--------|-----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

 

| March 2, 2009 | /s/Paul Schubert                                                                                                         |
|---------------|--------------------------------------------------------------------------------------------------------------------------|
|          | Paul Schubert                                                                                                            |
|          | Chief Financial Officer and                            Treasurer                                                         |
|          | NY Tax Free Money Fund and Tax Free Money Fund                            Investment, each a series of DWS Advisor Funds |