BT BB 48b(17) :ומאן דחתם אאשקלתא שפיר קא חתם‏ : one who signs on a sale transaction is properly signing
See the entire entry for ˀašqālā, ˀašqāltā v.n.C transaction of a sale

BT BB 48b(17) :מאן דחתם אמודעא שפיר קא חתם, ומאן דחתם אאשקלתא שפיר קא חתם‏ : the one who signs on the declaration document signs properly, and the one who signs on the bill of sale signs properly
See the entire entry for ḥtm vb. to seal, close up