4בַּמֶּה דְּבָרִים אֲמוּרִים כְּשֶׁהוֹצִיא הַמִּקָּח מִיַּד הַלּוֹקֵחַ בְּבֵית דִּין שֶׁל יִשְׂרָאֵל. כְּגוֹן שֶׁהָיָה הַמִּקָּח מִטַּלְטְלִין וְהָיוּ גְּנוּבִין אוֹ גְּזוּלִין אוֹ שֶׁהָיְתָה הַקַּרְקַע גְּזוּלָה. אוֹ שֶׁבָּא בַּעַל חוֹב שֶׁל מוֹכֵר וּטְרָפָהּ מִיַּד הַלּוֹקֵחַ וְהַכּל בְּבֵית דִּין שֶׁל יִשְׂרָאֵל. אֲבָל אִם הָעוֹבֵד כּוֹכָבִים הוּא שֶׁהוֹצִיא הַמִּקָּח מִן הַלּוֹקֵחַ בֵּין בְּדִין הַמֶּלֶךְ בֵּין בְּעַרְכָּאוֹת שֶׁלָּהֶן. אֵין הַמּוֹכֵר חַיָּב בְּאַחֲרָיוּתוֹ. וְאַף עַל פִּי שֶׁהָעוֹבֵד כּוֹכָבִים טוֹעֵן שֶׁהַמּוֹכֵר גָּנַב חֵפֶץ זֶה אוֹ גְּזָלָהּ מִמֶּנּוּ וְהֵבִיא עֵדֵי עַכּוּ"ם עַל כָּךְ אֵין הַמּוֹכֵר חַיָּב כְּלוּם. שֶׁזֶּה אֹנֶס הוּא וְאֵין הַמּוֹכֵר חַיָּב בְּאַחֲרָיוּת אֹנֶס:
When does the above apply? When the purchased article was expropriated from the purchaser in a Jewish court. For example, the purchased article was movable property and it was proven that it was obtained by theft or robbery, or landed property was taken by robbery, or a creditor of the seller came and expropriated it from the purchaser. All the above applies if the expropriation was dictated by a Jewish court. If, however, a gentile expropriates the purchased article from the purchaser, whether through an edict of the king or through a secular court, the seller is not responsible for the article. Although the gentile claims that the seller stole this article or robbed him of it and brought witnesses to that effect, the seller is not liable at all. For the expropriation of the article by gentiles is considered to be beyond the seller's control, and a seller is not liable for losses that are beyond his control.