No. If a signature has expired, it is invalid. Therefore, the Validator responds that it does not trust the key.
Regarding the procedure to follow to ensure the validity of a signature that is currently invalid, we highlight point 5 of section 4 of the Signature Maintenance Procedure:
"If the digital signature is technically invalid because the signer's certificate has expired and there is no valid timestamp, the following steps must be taken:
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Send it for validation on the alleged signing date, the signing date recorded in the document, or any date when the application manager believes the document was already stored in the system. Based on the set of new signature validations in this condition, a Document Signature Index will be created, listing the documents and validated signatures and linking them to the responses from the validation platform.
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A person responsible for the document management system or the processing platform must sign a document containing the mentioned Document Signature Index, certifying that those documents were signed and their signatures were technically valid at the time of entry into the system, providing validation tickets as proof. Each entity must determine the appropriate person to sign this document."
For more information, consult the Signature Maintenance Procedure: