PTGit 43.d:54[2] :חד אמ׳ מחל וחרנה אמ׳ לא מחל עד דמסר ליה שטרא‏ : one says it is remitted, but the other says it is not remitted until he has handed over the deed
See the entire entry for mḥl vb. to forgo, to remit

PTGit 43.d:54[2] :דין דמחל שטר לחבריה‏ : the one who forgave a promissory not to another
See the entire entry for šṭār, šṭārā n.m. document