A Southern California woman fed up with her packages getting stolen out of her post office box sent an Apple AirTag to the address and cleverly tracked down the suspected thief, police said.

The woman had had several items stolen from her mailbox at the Los Alamos Post Office already when she thought of the idea, the Santa Barbara County Sheriff’s Office said Tuesday. Apple’s $29 AirTags have become popular items since their 2021 release, helping users keep tabs on the location of anything from their lost keys to wallets and luggage.

On Monday morning, sheriff’s deputies were called to the post office where the woman told officials her mail had been stolen again — including the package with the AirTag.