Update your address with USCIS every time you move.

All foreign nationals (including Permanent Residents) must update their address with USCIS within ten days of moving by completing Form AR-11. You may either complete the AR-11 electronically through your USCIS online account (USCIS’s preferred method) or by mailing the AR-11 to the address indicated on page two of the form. 

For more information on the AR-11, please visit the USCIS website here.