Here are a few links on the SSA's site that mightbe helpful:
http://www.socialsecurity.gov/payee/faqrep.htm
http://www.socialsecurity.gov/payee/LessonPlan-2005-2.htm
Below is also from the SSA site.
What Is the Proper Use of Benefits?
Benefits should be used for current needs such as food, clothing, shelter, utilities, dental and medical care and personal comfort items, or reasonably foreseeable needs. If not needed for these purposes, the benefits must be conserved or invested on behalf of the beneficiary. Where the beneficiary has unmet current maintenance needs, saving benefits serves little purpose and would not be in the beneficiary's best interests.
A payee must use benefits in the best interests of the beneficiary, according to his/her best judgment.
What Are Some Examples of What Payees Cannot Do?
A payee cannot:
•Sign legal documents, other than Social Security documents, on behalf of a beneficiary.
•Have legal authority over earned income, pensions, or any income from sources other than Social Security or SSI.
•Use a beneficiary's money for the payee's personal expenses, or spend funds in a way that would leave the beneficiary without necessary items or services (housing, food, medical care).
•Put a beneficiary's Social Security or SSI funds in the payee’s or another person's account.
•Use a child beneficiary's "dedicated account" funds for basic living expenses. This only applies to disabled/blind SSI beneficiaries under age 18.
•Keep conserved funds once you are no longer the payee.
•Charge the beneficiary for services unless authorized by SSA to do so.
How Often Do I Need to Report to SSA on How Benefits Have Been Used?
Usually SSA will send you a "Representative Payee Report" once a year. When you receive the Report, you should either fill it out promptly and mail it back or follow the directions that you receive with the Report and submit the Report online. Whether you choose to complete the paper report or the online version, the report is simple to complete if you keep clear records of how the money is spent and /or saved throughout the year.