9הוֹצִיא עָלָיו שְׁטָר מְקֻיָּם שֶׁיֵּשׁ לוֹ עָלָיו מָנֶה וְאָמַר לוֹ הַלּוֶֹה הֲלֹא פְּרָעתִיךָ בִּפְנֵי פְּלוֹנִי וּפְלוֹנִי וּבָאוּ אֵלּוּ וְהֵעִידוּ שֶׁפְּרָעוֹ אֲבָל לֹא הִזְכִּיר לוֹ אֶת הַשְּׁטָר וְאָמַר לוֹ הַמַּלְוֶה כֵּן הוּא שֶׁפָּרַעְתָּ אֲבָל חוֹב אַחֵר פָּרַעְתָּ שֶׁהָיָה לִי אֶצְלְךָ הֲרֵי בָּטֵל הַשְּׁטָר. בַּמֶּה דְּבָרִים אֲמוּרִים כְּשֶׁהֵעִידוּ שֶׁנָּתַן לוֹ בְּתוֹרַת פֵּרָעוֹן אֲבָל אִם רָאוּהוּ נוֹתֵן לוֹ מָעוֹת וְלֹא יָדְעוּ אִם הוּא בְּתוֹרַת פֵּרָעוֹן אוֹ בְּתוֹרַת פִּקָּדוֹן אוֹ בְּתוֹרַת מַתָּנָה. אִם אָמַר בַּעַל הַשְּׁטָר לֹא הָיוּ דְּבָרִים מֵעוֹלָם הֲרֵי הֻחְזַק כַּפְרָן וּבָטֵל הַשְּׁטָר. וְאִם אָמַר פֵּרָעוֹן שֶׁל חוֹב אַחֵר הוּא הֲרֵי זֶה נֶאֱמָן וְנִשְׁבָּע וְנוֹטֵל מַה שֶׁבַּשְּׁטָר שֶׁהֲרֵי לֹא פְּרָעוֹ בְּעֵדִים. מִתּוֹךְ שֶׁיָּכוֹל לוֹמַר מַתָּנָה נְתָנָם לִי נֶאֱמָן לוֹמַר פֵּרָעוֹן שֶׁל חוֹב אַחֵר הֵן. אָמַר לוֹ הַלּוֶֹה וַהֲלֹא שְׁטַר חוֹב זֶה דְּמֵי שׁוֹר שֶׁלָּקַחְתִּי מִמְּךָ הוּא וְאַתָּה גָּבִיתָ דְּמֵי בְּשָׂרוֹ. וְאָמַר לוֹ בַּעַל הַשְּׁטָר כֵּן אֲנִי גָּבִיתִי אֶת דָּמָיו מֵחוֹב אַחֵר שֶׁהָיָה לִי אֶצְלְךָ. הוֹאִיל וְהוֹדָה מֵעַצְמוֹ שֶׁדְּמֵי הַשּׁוֹר הוּא הַחוֹב וּמִדָּמָיו נִפְרַע בָּטֵל הַשְּׁטָר. וְאַף עַל פִּי שֶׁאֵין עָלָיו עֵדִים שֶׁפָּרַע מִדָּמָיו יִשָּׁבַע הַלּוֶֹה הֶסֵּת שֶׁפְּרָעוֹ. וְכֵן כָּל כַּיּוֹצֵא בָּזֶה:
A promissory note is disqualified in the following situation. A lender produces a promissory note whose authenticity has been verified that indicates that the borrower owes him a maneh. The borrower states: "Did I not pay in the presence of so-and-so and so-and-so." Those witnesses come and testify that the borrower indeed repaid the lender, but did not mention the promissory note. The lender replies: "It is true that you paid me, but you repaid me for another debt that you owed me." The lender's word is not accepted, and the promissory note is nullified. When does the above apply? When the witnesses testify that the borrower gave the lender the money as repayment of a debt. If, however, they saw him give him money, but did not know whether it was given as repayment of a debt, for safekeeping or as a present different rules apply. If the possessor of the promissory note says: "He never repaid me," he is established as a liar, and the promissory note is nullified. If he says: "It was payment for another debt," his word is accepted. He must take an oath and then he may collect the money mentioned in the promissory note. The rationale is that the borrower did not repay him in the presence of witnesses. Hence, since the borrower can claim: "You gave them to me as a present," his word is accepted if he says that the money was given him as repayment for another debt. A promissory note is, by contrast, nullified in the following situation. The borrower told the lender: "This promissory note was composed for the price of a steer that I purchased from you, and you collected the money for its meat already." The lender replied: "Yes. The promissory note was composed for that purpose, but I collected the money for that debt with the understanding that the promissory note would apply to another debt that you owe me." The rationale is that the lender himself admitted that the debt mentioned in the promissory note was for the meat of the steer, and that he received payment for that debt. This applies even if there are no witnesses that the money was given for the payment of that debt. Hence, all that is necessary is that the borrower take a sh'vuat hesset that he paid the debt. Similar principles apply in all analogous situations.