Source and decoding
מתני׳ מצא גיטי נשים ושחרורי עבדים, דייתיקי, מתנה, ושוברין – הרי זה לא יחזיר. שאני אומר: כתובין היו, ונמלך עליהן שלא לתנן.
Mishnah: If one finds bills of divorce, deeds of emancipation, wills, deeds of gift, or receipts, he must not return them: perhaps they were written, but their issuers decided not to deliver them.
A written get does not prove delivery: the writer may reconsider. Other documents share this concern. Duplicate names and travelers raise separate identification issues. Distinguish nondelivery from mistaken identity; this is not practical divorce guidance.