When Dad locks himself out once, it is a bad afternoon. When keys keep turning up in strange places or he gets locked out again and again, it is a pattern, and a pattern needs a different response than a single mistake. Your job is to write down what you see, sort it into the right kind of problem, and decide who needs to hear it.
Local option: New Plan Care gives families in the St. Louis area in-home help so a parent can stay home: companionship, help with bathing and dressing, meals, and overnight care. Call (314) 405-0887.
Write Down What Happens
Keep a private note outside the house. For each event, write the day and time, where the key was found or where he got locked out, and what he was doing just before. Keys in the refrigerator, the freezer, a coat he no longer wears, or the car left running in the drive all belong in the note. So do repeated trips to a neighbor for a spare, and any moment he could not say which key opened which door.
Lockout, Lost, or Hidden
These need different answers. A lockout means the key was inside or in the wrong pocket at the wrong moment, which a hook, a second location, or a lockbox can address. A lost key has gone missing for days, which points to a storage habit that needs a fixed spot. A hidden key was put somewhere on purpose and then forgotten, which is harder to fix with objects alone and usually calls for a conversation. Sort each event into one of the three before you decide what to do.
When It Is More Than a Habit
Ask his doctor about the pattern if you see several of these together: keys in odd places, repeated lockouts, a car left running, trouble with a routine he used to do without thinking, or confusion about which key fits which door. Describe the specific events from your note, not a general worry. The doctor decides what it means. Your part is to bring a clear record and say when it started and how it has changed.
What Not to Do
Do not take every key away without a plan, because that can leave him stranded and angry. Do not hide keys in places he cannot find in an emergency, and make sure the emergency holder knows where they are. Do not argue about whether an event happened. Say what you saw, in the order it happened, and ask what he remembers.
The Start Here page lays out the order most families use when a pattern like this shows up.
Next move: tonight, write down the last three times a key went missing or a door locked him out, with where each key was found. Bring that list to his next doctor visit and ask the doctor what else they want to know about the pattern before the next appointment.