You wrote the backup name down. Maybe it is on the fridge, in the folder, or in your phone under a label you chose at midnight. That feels like a plan, and it is the start of one. But a name on paper does not tell you whether that person can still do the job. This guide is for the moment you want to check, before the day you need them.
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The person moved, changed numbers, or got busy with their own life
Backups are usually people who love you, and their lives keep moving. Ask your backup to read the page with you every season, not once and then never again. Confirm that the phone number still works, that the address is current, and that they still have the hours you wrote down. If they hesitate when you ask, believe the hesitation and add a second name.
They have never been inside the house
Someone who has never seen the front door, the bathroom layout, or the route from the car to the kitchen will spend the first hour of a real emergency learning the house while your parent waits. Ask them to come by for one ordinary hour while you are home. Let them find the light switches, the lock, and the chair your parent always uses. Pay attention to what they ask you. Those questions are your to-do list.
Nobody knows where the papers are
Your backup needs to know where the insurance cards, the doctor names, and the list of your parent's medicines are kept, and who to call first. Your job is to say where each item lives and who holds it. The medication list stays with the family, the prescribing doctor, and the pharmacist. A backup can be told where that list is kept, but they should not be the one deciding what goes into the pill box. Write the location of each paper on the same page as the backup name, so they travel together.
They have never heard what a bad day looks like
A backup who knows only the calm routine will be caught off guard by confusion, a fall, or a night with no sleep. Tell them the signs that mean call you right away, and the signs that mean call emergency services. Keep the list short enough to remember without the page. Ask them to say it back to you. If they cannot, the plan is not ready yet, and that is useful to know now.
You are not sure they would say yes
Ask the question out loud and in full: can you take Thursday from two to six while I am out of the house. A real yes usually comes with a reason or a time they can actually keep. A long pause, or a vague answer about checking their calendar, counts as a maybe. Treat a maybe as a gap, and find the next name.
You are allowed to change the list when a name stops working. Replacing someone is not a betrayal, and it does not mean the first person failed you. It means the plan is being kept current, which is the whole point of writing it down. Put the day you last checked at the top of the page, and make that check part of the same routine as your other paperwork. For more on building the backup on paper, start with Permission and a Plan.