<p></p>
<blockquote>
<blockquote>
<p>The tricky part here is how to verify he is who he says he is</p>
</blockquote>
<p>He should be able to open mediation or arbitration case. cmd+o if it was not opened before.<br>
Why he did not get any reply for so long? Who was his mediator?</p>
</blockquote>
<p>Doesn't look like he can since he lost his files and backup was from before the trade. He didn't answer my messages (I was the mediator) for the same reason.  See <a class="user-mention" data-hovercard-type="user" data-hovercard-url="/users/MwithM/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/MwithM">@MwithM</a> 's comment:</p>
<blockquote>
<p>"Trader lost Bisq data, has old backup but can't find the offer. This is the metadata of the trade:</p>
</blockquote>
<p>one way to verify is to prove ownership of the receiving XMR address, since the trade was executed correctly as far as I remember</p>

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