Responsa for Bava Batra 68:3

זה אומר של אבותי וזה אומר של אבותי אמר רב נחמן כל דאלים גבר ומאי שנא משני שטרות היוצאין ביום אחד

R. Papa says we should release.<span class="x" onmousemove="('comment',' Because they only attached it from the first on this condition. ');">⁹</span> The accepted ruling is that we should not attach in the first instance, but if we have attached we should not release.<span class="x" onmousemove="('comment',' I.e., the halachah follows R. Judah. ');">¹⁰</span> [If there are two claimants to a property<span class="x" onmousemove="('comment',' Whether landed property or other. ');">¹¹</span> and] one says,' It belonged to my father,' while the other says, 'To my father' [without either of them bringing any evidence], R. Nahman says that whichever is stronger can take possession.<span class="x" onmousemove="('comment',' v. supra n. 7. ');">¹²</span> Why, [it may be asked,] should the ruling be different here from the case in which two deeds [of sale or gift relating to the same property and] bearing the same date

Teshuvot Maharam