I have an inmate's address if you want to play postal with him. thanx

His address is in my profile …he's ready for your competition…tyvm

Please join/renew the United States Chess Federation asap tyvm

rates rise June 1st — thanx

inmate D38967 awaits your move via jpay.com … he only responds via letters

No numbers/digits?

So maybe “white square bishop to fourth file, check” check?