Responsa for Yevamot 240:2
ולהך לישנא דאמר רבא סימנין דאורייתא הא קתני אף על פי שיש סימנין בגופו ובכליו
and the other Master is of the opinion that it does not constitute a distinct identification mark. With reference to the version according to which Raba stated that 'identification marks are valid Pentateuchally' [the objection might be raised:] Surely it was taught, THOUGH THERE WERE ALSO MARKS ON THE MAN'S BODY OR CLOTHING!<span class="x" onmousemove="('comment',' If identification marks have pentateuchal validity these should have been regarded as reliable. ');"><sup>3</sup></span> — As to the BODY [the marks indicated by the witnesses were only that the corpse was] long or short;<span class="x" onmousemove="('comment',' Which cannot be regarded as reliable marks of identification. ');"><sup>4</sup></span>
Teshuvot Maharam
A. Neither a general rumor, nor the finding of one's garments on a dead body, are sufficient to establish the death of an individual. But a woman is believed when she identifies her husband's body through a mole. A's wife may, therefore, remarry.
SOURCES: Pr. 371.