9מִי שֶׁהָיָה לוֹ פִּקָּדוֹן בְּיַד אַחֵר הֲרֵי זֶה מַקְנֵהוּ בֵּין בְּמֶכֶר בֵּין בְּמַתָּנָה. לְפִי שֶׁהַפִּקָּדוֹן בִּרְשׁוּת בְּעָלָיו הוּא וַהֲרֵי הוּא בְּחֶזְקַת שֶׁהוּא קַיָּם. וְאִם כָּפַר בּוֹ זֶה שֶׁהֻפְקַד אֶצְלוֹ אֵינוֹ יָכוֹל לְהַקְנוֹתוֹ. שֶׁזֶּה כְּמִי שֶׁאָבַד שֶׁאֵינוֹ בִּרְשׁוּתוֹ. אֲבָל הַמִּלְוֶה הוֹאִיל וּלְהוֹצָאָה נִתְּנָה אֵינָהּ בָּעוֹלָם וְאֵין אָדָם יָכוֹל לְהַקְנוֹתָהּ אֶלָּא בְּמַעֲמַד שְׁלָשְׁתָּן. וְהוּא דָּבָר שֶׁאֵין לוֹ טַעַם כְּמוֹ שֶׁבֵּאַרְנוּ. וְאִם הָיְתָה מִלְוֶה בִּשְׁטָר מַקְנֶה אֶת הַשְּׁטָר בִּכְתִיבָה וּמְסִירָה שֶׁהֲרֵי יֵשׁ כָּאן דָּבָר הַנִּמְסָר לִקְנוֹת שִׁעְבּוּד שֶׁבּוֹ:
When a person has entrusted an object to a colleague for safekeeping, he may transfer ownership over it, either through a sale or through a gift. The rationale is that an entrusted object is in the domain of its owner, and we operate under the presumption that the entrusted object continues to exists If, however, the person to whom the article was entrusted denies receiving it, the owner may not transfer ownership of it. It is as if the article were lost; it is not in his domain. Different rules apply with regard to a loan. Since a loan is given with the intent that it be spent, it cannot be transferred except through a ma'amad sh'loshtam, a convention that is not based on a motivating reason, as we have explained. If the loan was supported by a promissory note, the creditor may transfer ownership of the promissory note with a written authorization and the transfer of the note, for there is an entity that can be transferred through which one can acquire the encumbrance it contains.