Ssi New York

I have a boyfriend in New York who is on SSI supplement insurance [name], he wants to go to Sumas, Washington, will follow his iff there?

Yes. it may take as long as it remains in the United States. he needs to contact the Social Security office and let them know when he decided to move so they have updated information on his record.
(There have been cases where peopldon'tnt leave the Social Security office know and they sent something in the mail recipient it has been returned to their temporary suspension of benefits until the recipient makes contact)

you must make changes in a certain period of time so make sure your friend takes care of that.
The phone number is 1-800-772-1213