Responsa for Bava Batra 348:17
דאיתמר ערב דכתובה דברי הכל לא משתעבד קבלן דבעל חוב דברי הכל משתעבד קבלן דכתובה וערב דבעל חוב פליגי מר סבר אי אית ליה נכסי ללוה משתעבד אי לית ליה לא משתעבד ומר סבר בין אית ליה ובין לית ליה משתעבד
is not responsible for payment? — He was a kabbelan.<span class="x" onmousemove="('comment',' V. Glos. ');"><sup>48</sup></span> This [reply] would be quite correct according to him who said that, though the husband had no property, a kabbelan for a <i>kethubah</i> is responsible for payment; what, however, can be replied according to him who said [that] he is responsible for payment [only] where the [husband]<span class="x" onmousemove="('comment',' Lit., 'to him'. ');"><sup>49</sup></span> has [property], but is not responsible for payment where the husband has not?<span class="x" onmousemove="('comment',' Since R. Huna was poor, he could not have been the possessor of any property. His father, consequently, though a kabbelan, could not have become liable for the payment of the kethubah. ');"><sup>50</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.