Electronic signatures are authenticated utilizing near field communication (NFC) devices as proof of identity. An identification service collects an identification of a NFC device associated with a signer of a contract. The identification may be utilized as an access control mechanism that enables the signer to receive, view, or sign the contract. An electronic signature associated with the signer is received. The identification of the NFC device and the electronic signature of the signer are recorded in the contract and/or audit information associated with the contract.