Apparently there is a difference between a mechanical and a computer stamp. One of the medical supply places had a statement that computer stamps were acceptable to HCFA, which is apparently the rub. I have put a statement in my electronic cover sheet that the signature is computer generated and not a stamp, and as such is acceptable to HCFA. If they will not accept this, they need to send an original with a SASE for a reply. I rarely get the latter.