According to the Social Security Administration web site:
A representative payee is an individual or organization appointed by SSA to receive Social Security and/or SSI benefits for someone who cannot manage or direct someone else to manage his or her money. The main responsibilities of a payee are to use the benefits to pay for the current and foreseeable needs of the beneficiary and properly save any benefits not needed to meet current needs. A payee must also keep records of expenses. When SSA requests a report, a payee must provide an accounting to SSA of how benefits were used or saved.
You can get answers to frequently asked questions on this topic at
http://www.ssa.gov/payee/faqrep.htm
You can visit your local Social Security office for more information and to make an application to become the payee.

