An example operation may include one or more of receiving a vehicle request from a user device, upon arrival of a vehicle to a requested location, comparing vehicle cryptographic hash key information associated with the vehicle with user device cryptographic hash key information to identify a current status of the vehicle, determining whether the current status of the vehicle passes an appraisal standard stored in a smart contract, and when the current status of the vehicle is identified as passing the appraisal standard and the cryptographic hash key information associated with the vehicle matches the user device cryptographic hash key information, notifying the user device of an approval of the appraisal standard.