What is the duration of validity of a document with PDF Advanced E-Signature (PAdES)? SignTime Support Team Published October 04, 2022 06:21 Updated October 04, 2022 06:21 A document with PDF Advanced E-Signature (PAdES) with have validity for 10 years. Related articles How to validate a PAdES (Long-term Signatures) How do I validate a PDF Advanced E-Signature (PAdES)? Are electronic contracts legal? Is there a difference in legal validity depending on the signature method? Do I need to pay a stamp tax on electronic contracts?