A spare key is a promise that someone will get into the house on a bad day. Before you hand one over, compare the holders the way you would compare any service you will depend on. The three choices most families weigh are a trusted person nearby, a professional key-holding service, and a lockbox or keypad at the door. Each answers the same five questions differently.

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.

Reach and speed

Ask whether the holder can get to the house within a time you can accept. A neighbor who works two states away is a poor holder for a locked door at night. A service may promise a response window, so ask what that window is, which hours it covers, and whether it applies on weekends. Write the answer beside the holder's name.

Authority

Find out what the holder is allowed to do once inside. Does Dad know and agree that this person may enter? Is there a written note from him, or a line in a document you already have? Without that, a holder may be entering a home without clear permission, which causes trouble for everyone. If the holder is a service, ask what their written authorization process is before anyone goes in.

Records

A professional service should keep a record of who was dispatched, when they arrived, and what was done. A lockbox may or may not log openings, depending on the model. Ask whether the record is available to you, how long it is kept, and whether it can be printed or exported. A holder who cannot show you what happened is harder to trust after the fact.

Replacement and damage

Ask what happens if a key is lost, copied, or the holder moves away. Ask who pays for a lock change, who pays if the door is damaged during entry, and whether the service carries insurance. Request the certificate of insurance itself rather than accepting a verbal yes. For a lockbox, ask who can change the code and how a forgotten code is reset.

Exit

Know how to take a key back. Ask how the holder confirms the key was returned, how the arrangement ends, and whether a fee applies to ending it. For a lockbox or keypad, confirm whether you can change the code yourself without the installer, so that a holder who leaves can be removed the same day.

Putting it on one sheet

Keep a single list with each holder's name, phone number, what they can do, the entry method, and how their key comes back. Do not write the home address on a key tag or on anything that leaves the house. Share the list with one other person you trust, and keep a copy where Dad keeps his papers.

Your next move

Pick the two holders who look strongest on reach and authority, and put the five questions above to each one in writing. Then fill in the one-page list and ask Dad to sign off on who has access. If you need a local option to compare, the resource page at Local Help in St. Louis is a place to start.