# How to share a door code with guests

> Send the code in a temp.cool link that expires shortly after the guest arrives, and change the code between guests. The chat keeps only a dead link, so an old phone or a forwarded message can't open your door.

1. **Put the code and the instructions in one link** Add the address, which door, and how the key safe or alarm works. Clear steps save a phone call at midnight.
2. **Set the timer to arrival day** Pick 1 day or 7 days, depending on when they arrive. Allow 2 views if they might open it again at the door.
3. **Change the code after they leave** Smart locks and key safes make this quick. A new code for each guest is the real protection.

## Who this is for

- **Holiday rental hosts** sending check-in details.
- **Homeowners** letting in a cleaner, a dog sitter or a contractor.
- **Offices** giving a temporary alarm code to a supplier.

## Why not just text it?

A code in a text or WhatsApp stays on the guest's phone, in backups and in group chats it gets forwarded to. Months later it still opens your door if you forgot to change it. A one-time link disappears after use.

## Tips

- **Send the link a day before arrival**, not weeks ahead, so the timer can be short.
- **Use a QR code for printed welcome cards.** temp.cool shows a QR code for every link, handy for a cleaner's checklist or a note at reception.
- **Never reuse your own codes.** Guests should get a code that is only theirs.