R.I. Gen. Laws § 17-20-19: Envelopes for return of ballots.

Envelopes for the enclosure and return of mail ballots and their enclosing certified envelope shall have the printed or written address: “Board of Elections, 2000 Plainfield Pike, Cranston, Rhode Island 02921” or a post office box established and maintained by the board; and shall be forwarded by the secretary of state to each mail voter whose application for the mail ballot has been received and accepted.