Electronic Document Reliability Verification System is a service system provided by the Electronic Transactions Development Agency. (Public Organization) or ETDA. Prepared under the e-Trade Facilitation project for the benefit of facilitating agencies and entrepreneurs. There should be a source to check electronic documents about the reliability of electronic time stamping (e-Time Stamping), signing with electronic signatures. Including documents, electronic tax invoices (e-Tax Invoice), which is a mission in response to government policies. According to the Government Facilitation Act, B.E. 2558 to promote business operations in Thailand to be faster.

Verifying the credibility of electronic documents can verify electronic timestamps. any change caused to the electronic signature Electronic signature details including electronic signature owner information The completeness and accuracy of the documents according to the list of structures registered with the ETDA and the completeness and correctness of the structure of electronic tax invoice documents. The form of verification is based on the method of Cryptography, however, this service does not include verification of the contents of such documents.