Almost every arrival problem is one of four things, and all four are fixed by writing the message differently rather than by buying anything. Here is what to send, when, and what to say.
You know the lockbox is on the porch rail. Your guest, in the dark, with bags, does not. A code with no location is an answer to a question nobody asked.
The code is 4412.
The lockbox is on the porch rail to the left of the front door, about knee height. Code 4412. Clear it with the button at the bottom first, then the numbers, then slide the cover down.
If the only copy of the code lives behind a login, then a dead battery, an expired session or a bad signal on a country road all end the same way: a phone call to you. Whatever you use, the guest should end up holding something that opens without signing in to anything.
A message on the morning of arrival is read in a car or not at all. The day before, somebody is at home packing and can actually do something about a question. Send it then, and you also buy yourself a whole day to answer anything it raises.
Most late-night arrival problems are not broken locks. They are somebody who tried twice, concluded they were doing it wrong, and then spent twenty minutes deciding whether it was acceptable to bother you. One sentence removes that entirely.
Change the names and the details. The shape is what matters.
Hi Sarah, you are in tomorrow and everything is ready. Check-in is any time after 4pm and there is no need to let me know when you are coming.
Getting in: the lockbox is on the porch rail, to the left of the front door, about knee height. The code is 4412. Press the button at the bottom to clear it, then the numbers, then slide the cover down. The key inside opens the front and the back door, and it goes back in the box when you leave.
Parking: the driveway is yours, both spaces.
Everything else is on this page, and you do not need an app or an account to open it: the wifi, the thermostat, where the hairdryer is, which bin goes out. [link]
If anything at all does not work, call or text me. Any hour, honestly, I would much rather that than you standing on the porch.
It is five short paragraphs and four of them are things the guest will need in the next eighteen hours. Nothing in it is a welcome speech, because a welcome speech is what makes somebody stop reading before they get to the code.
The rule that holds up: the message carries what is needed in the next hour, the page carries everything else. A message long enough to include the coffee maker is a message where the door code is in paragraph six.
One line, and only if they have not replied to the first. Anything longer reads as chasing.
Morning Sarah. Just in case it got buried: lockbox on the porch rail, code 4412, everything else is here. [link] Safe trip.
If a guest asks you something that was already written down, that is not a guest who did not read it, that is a thing written in the wrong place or the wrong words. Move it or rewrite it before the next arrival. Do that four or five times and the texts genuinely stop.
The page the message links to is what Roost makes. It arrives already holding the questions guests ask, with the answers blank, and what comes out is one link that needs no app and no account.
The day before arrival, not the morning of. A message that lands the day before is read while somebody is packing and still has the attention to act on it. One that lands on the day is read in a car, if at all. Send it again on the day only if they have not opened it.
Put it where it survives a dead battery and no signal, which usually means both: in the message so they can find it in their thread, and on a page they can open without an app. A code that only exists inside a booking platform app is a code that is unreachable at the one moment it is needed.
It is as safe as the message, which is to say reasonably, and far safer than the alternatives hosts actually use, like a key under the mat. Change the code between guests if your lock lets you. The real risk is not interception, it is the code staying the same for three years.
Make sure the message says who to call and that calling is fine. Most late-night lockouts are not a broken lock, they are somebody who tried twice, decided they were doing it wrong, and spent twenty minutes not wanting to bother you.