Responsa for Bava Batra 348:19
אמר רב הונא שכיב מרע שהקדיש כל נכסיו ואמר מנה לפלוני בידי נאמן חזקה אין אדם עושה קנוניא על הקדש
of all, not responsible for payment;<span class="x" onmousemove="('comment',' The reason is given infra. ');"><sup>54</sup></span> a kabbelan for a creditor is, in the opinion of all, responsible for payment; [in the case, however, of] a kabbelan for a <i>kethubah</i> or a guarantor for a creditor, there is a dispute. [One] Master holds that he<span class="x" onmousemove="('comment',' The guarantor. ');"><sup>55</sup></span> is responsible only where the debtor has property, but if he has none, he is not responsible;<span class="x" onmousemove="('comment',' Since no one would guarantee a loan where it is known that the debtor has no means wherewith to meet his obligations. A guarantee in such a case must not, therefore, be taken seriously. ');"><sup>56</sup></span>
Teshuvot Maharam
A. Since B's mother did not take the required oath regarding her ketubah, she had no property of her own; even the clothes she wore on week-days belonged to the estate. Consequently B is unable to carry out his mother's instructions. B is under no moral obligation to repay his mother's debt since the mother herself had not been pressed for payment.
SOURCES: Cr. 76.