Source and decoding
אמר רבי אבהו אמר רבי יוחנן: המוצא שטר חוב בשוק, אף על פי שכתוב בו הנפק – לא יחזירו לבעלים.
Rabbi Abbahu said in Rabbi Yohanan’s name: One who finds a debt document in the marketplace must not return it to its owner, even if it bears a court’s certification.
Authentication validates the note, not an unpaid balance. Rabbi Yohanan still fears repayment. The same-day case is separately discussed. Separate documentary authenticity from the current obligation.