Your visitor has found her coat. Someone carries a dish to the car. The front door stays open while goodbye stretches across the threshold. Mom stands, watches, and begins moving toward them.

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This is the moment to notice early. Mom does not have to announce that she is leaving. She may simply follow the people, light, voices, or movement in front of her. The Alzheimer's Association notes that someone may go through a door simply because it is there, without having formed a plan to leave. Its guidance also identifies restlessness, repeated movement, and difficulty finding familiar rooms as signs that wandering may become a concern. You can find the source behind that guidance on the Mom Wanders Sources page.

Watch the goodbye, not just the lock

The weak point may begin before anyone touches the knob. Notice whether Mom rises when a visitor gathers a purse, follows coats into the hall, asks where everyone is going, or waits close enough to pass through with them. Those small movements tell you that the departure needs an owner.

Do not depend on every guest recognizing the risk. A familiar visitor may assume Mom will stop at the threshold. A delivery driver may leave the door wide while setting something down. A child may run back for a forgotten glove. Build one routine that works even when the person leaving is distracted.

Give one person the inside position

Before the first coat comes off its hook, decide who stays inside with Mom. That person does not carry bags, walk guests to their cars, or step onto the porch for one last sentence. Their whole job is to remain between Mom and the open route without crowding her.

Give Mom a place to go next. Ask her to sit with you, hold a napkin, look at a photograph, or help put one harmless item away. Choose something she can begin before the door opens. A vague instruction such as “Stay here” leaves her watching everyone else act.

Use ordinary words with visitors: “I will stay with Mom. Please close the door behind you, even if someone else is coming back in.” If several people are leaving, send them through together. Repeated openings create repeated chances for the handoff to fail.

Find the first sign that the routine is breaking

Stand where you can see Mom, the latch, and the person leaving. Look for these early warnings:

The visitor opens the door before the inside person is ready. Mom is already in the hall. Someone calls goodbye from outside and draws her closer. A bag, pet, or child keeps the doorway open. The door closes but does not latch. The person assigned to Mom follows the conversation onto the porch.

Any one of these means the plan needs to stop and reset. Close the door. Bring everyone fully inside or fully outside. Settle Mom with the inside person. Then try the departure again. You do not need to explain the correction at length while she is standing near the exit.

Test the door after the visit

Close the door with the same force a hurried guest would use. Confirm that the latch catches without someone pulling or lifting the door. Check whether an open-door alert can be heard where the responsible person actually sits. The National Institute on Aging recommends keeping exterior doors secured and considering an alert that sounds when a door opens. It also says to keep the emergency key nearby if an added keyed lock is used. Those measures should support supervision, not leave Mom locked inside without help.

Then look at what the departure left behind. Put away spare keys, visitor coats, bags, and anything else that makes the hall look as though another trip is starting. Both the National Institute on Aging and the Alzheimer's Association include departure items and door alerts in their wandering-safety guidance, which is collected through the site's cited sources.

Write down the failure, not a judgment about Mom

If she reached the porch, record what happened just before it: who was leaving, which door was used, whether it latched, where the inside person stood, and what first drew Mom toward the hall. That gives you something concrete to change at the next visit.

You may learn that the front door is hardest when several people leave together. You may find that the garage entry is quieter but easier to overlook. You may see that Mom follows one particular person or moves when she hears car keys. Treat that pattern as useful information.

For the next goodbye, change one part and watch it closely. Move coats away earlier. Have one person bring cars around while everyone else remains seated. Use a different exit only if it can be supervised and safely secured. Confirm the latch after every departure.

Make the rule easy to hand over

Put a short note where visitors prepare to leave: “Tell us before opening the door. One person stays with Mom. Close and check the latch.” Read it aloud to new helpers rather than hoping they notice it.

If departures keep placing Mom at the threshold, fold this routine into the larger dusk plan. Start Here: Dusk to Morning, in Order can help you connect the doorway handoff with the rest of the evening.

The goal is not a perfect goodbye. It is a closed, checked door and a clear handoff before everyone assumes someone else is watching.

The Visit Ends at Dusk. Close the Open-Door Gap Before Mom Follows Anyone Out.