What if somebody copies your signature on a contract that says you can&#39;t sue them?
<p>What can the person do in such cases? And further more, what can the judge do to stop this paradox?</p>

<blockquote>
  <p>What if somebody copies your signature on a contract that says you
  can't sue them?</p>
  
  <p>what can the judge do to stop this paradox?</p>
</blockquote>

<p>I will assume that by "<em>copying the signature</em>" you mean "<em>without the person's consent</em>". In that case, the contract is void and consequently <em>unenforceable</em>. However, it would need to be proved that the person whose signature was unlawfully used did not intend to be a party to that contract.</p>

<p>For a contract to be valid, the parties must have <em>knowingly</em> and <em>willfully</em> entered it, whether it is via a document or through their subsequent conduct/actions. False pretenses, identity theft, and akin offenses preclude these two essential requirements of any contract. Moreover, if the person who forged the signature is a party to the contract, then that unlawful act clearly contradicts the prerequisite "<em>covenant of good faith and fair dealing</em>" that is presumed in contracts.</p>

<p>The remedies or actionability available to a person whose signature has been forged depend on the laws of each jurisdiction.</p>

<p>A  fraudulent contract wouldn't be binding, but to take a different approach there's also the question of <a href="https://en.wikipedia.org/wiki/Consideration_in_English_law" rel="nofollow noreferrer">consideration</a>. What did you agree to receive in return for agreeing not to sue the other party, and can the other party show that you received it?</p>
<p>From the link :</p>
<blockquote>
<p>Consideration can be anything of value (such as an goods, money,
services, or promises of any of these), which each party gives as a
quid pro quo to support their side of the bargain. Mutual promises
constitute consideration for each other.<a href="https://en.wikipedia.org/wiki/Consideration_in_English_law" rel="nofollow noreferrer">1</a> If only one party offers
consideration, the agreement is a &quot;bare promise&quot; and is unenforceable.</p>
</blockquote>
<p>Possible jurisdictional question (the link refers to English Law), but English Common Law gets around...</p>

contract-law signature forgery