Unexpected wedding gift

Cassandra Warren and Jesse Jones live near Eugene, Oregon. They're getting married this June and recently mailed out their wedding invitations. Cassandra thought she sent one to her aunt and uncle, but she wrote an incorrect address and a random stranger got it instead.

The stranger replied by mailing the invitation back to them along with a note which said, "I wish I knew you. This is going to be a blast. I've been married 40 years and it gets better with age. Go have dinner on me," and he enclosed a $20 bill as an early wedding gift. Cassandra says she has already sent him a thank-you note.