When does the caveat subscriptor rule not apply?

The caveat subscriptor rule, which means "let the signer beware," does not apply when the signer is misled or not fully informed about the nature of the document being signed. It also does not apply in cases of fraud, duress, or if the signer lacks the mental capacity to understand the implications of the contract. Additionally, if there is a significant inequality in bargaining power or if the terms are unconscionable, courts may refuse to enforce the caveat subscriptor principle.