Locks with Audit trails

Hotel room locks - Ving etc.

Medeco produce a electronic type lock for parking meters, vending, etc where an audit trail is maintained both in the lock and the key.

Videx Cyberlock cylinders came to mind for an easy retrofit.

What kind of door lock is being targeted? Do you have the budget to replace the whole lockset, or just the cylinder?

Kaba, Schlage, S&G and many other vendors have various standalone access audit product offerings.

I'd recommend doing a Google search for "electronic lock audit trail"...