A certificate identification system comprises multiple source devices configured to generate an artifact which comprises features indicating user data and an action, a certificate database configured to store certificates comprising user identity information corresponds to its signatory, and an identity manager in signal communication with the source devices and the certificate database. The identity manager is configured to receive the artifact from a source device of the source devices; identify the features in the artifact using natural language processing; determine a signatory based on the identified features in the artifact; retrieve a certificate corresponding to the signatory from the certificate database; compare the identified features in the artifact with the user identity information which corresponds to the signatory comprised in the retrieved certificate; identify that the identified features in the artifact match the user identity information comprised in the retrieved certificate; and attach the retrieved certificate to the artifact.