Mail for Deceased Persons  
If you are receiving mail addressed to a person who is deceased, you can redirect the personal mail by following these steps.
 
Redirect mail addressed to a deceased individual.
U.S. Postal Service® will continue to deliver mail addressed to a deceased person until we are notified of a change in delivery preference. If you would like the deceased’s mail to be forwarded to a different address, such as that of an appointed executor or administrator, simply file the request at your local Post Office™.

For additional information see the Domestic Mail Manual.

The Deceased Do Not Contact List.
You may request to have the deceased’s name removed from commercial marketing lists. To assist in this process, the Direct Marketing Association (DMA) has created a Deceased Do Not Contact list. All DMA members are required to remove names on this list from their mailing lists and many non-DMA members comply, as well. Once a name is registered, commercial contacts from DMA members should begin to decrease within three months. There is a $1 fee for the service. To register a name or learn more, visit the DMA Web site.