in reply to @chris20 You know, my brother in law has dementia, and my sister's keys went missing for two weeks. She thought my brother-in-law had thrown out the keys..."it happens. " She has some kind of "card" in her wallet that uses an app on her iPhone to help find lost objects. It is akin to a credit card. Her son recently came over and they were able to discover that she had left her keys in the mailbox, and someone turned them into the HOA where she lives. The "card" was able to track the keys to the HOA office. Would something like this be of benefit to you?