credentialscre·den·tials /krɪˈdenʃəlz/ noun [plural]JOB1the training, education, or experience that give you the ability to do a particular job or task well, especially in the opinion of other peopleYou’ll be given a three-month probationary period to fully establish your credentials as an accountant.
2a letter or other document that proves that someone is who they say they are or has the ability to do a particular job or taskSwiss police checked the drivers’ credentials before allowing them to pick up the delegates.