Related for Avodah Zarah 59:1
איחלופי כיון דאיכא חותם אחד לא טרח ומזייף
if we are concerned that he might exchange it for his own — since there is one seal, he would not take the trouble to falsify it.
Tosefta Terumot
We [may] take terumah of unboiled wine on behalf of boiled wine, but not boiled on behalf of unboiled (Ter. 2:6). Rabban Shimon ben Gamaliel says, even the boiled on behalf of the unboiled, and furthermore Rabban Shimon ben Gamaliel says, wine that is boiled is no longer subject to [the laws regarding] uncovered liquids (Ter. 8:4) or subject to [the laws regarding] wine of libation (Avodah Zarah 30a:5).
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