credential

Pertaining to or serving as an introduction or recommendation (to someone).

their credential letters on both sides

documentary or electronic evidence that a person has certain status or privileges

May I see your credentials, please?

The computer verifies the user's credentials before allowing them to log on.

Evidence of skill or excellence.

They deserved their half-time lead and looked fully in control until Brazil made changes at the break and began to show their credentials in attack.

to furnish with credentials

School superintendents, principals, and teachers are currently credentialed only by the state.

The newly credentialled ambassador to the Holy See is already in the PM's good books.