Reference for Bava Batra 336:3

נקרע פסול נתקרע כשר נמחק או נטשטש אם רישומו ניכר כשר

he is required to produce proof.<span class="x" onmousemove="('comment',' As to the contents of the bond such as date, sum, etc. ');">⁴</span> [A bond] intentionally torn is invalid; if torn accidentally, it is valid. [In case] it was effaced or obliterated, if the tracing<span class="x" onmousemove="('comment',' Lit., 'its tracing'. ');">⁵</span>

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