Self Check-In for Alojamento Local: Options, Pitfalls and How to Explain Arrival
published 28 September 2026
Waiting for a guest whose flight is three hours late is one of the most draining parts of running an Alojamento Local (AL), Portugal's short-term rental regime. Self check-in solves that, but creates a new risk: if the guest cannot follow the instructions, they are stuck outside, at night, with nobody to ask. This guide compares the most common options and explains how to communicate arrival so the system actually works.
Portuguese Law Allows Remote Check-In
Every Alojamento Local must provide a reception service (check-in and check-out) and information for guests. According to Turismo de Portugal's technical guide to Alojamento Local, that service can be provided in person or remotely, in particular by phone or electronically.
Two conditions do not go away with self check-in:
- Guests must have a way to contact the reception service, along with the national emergency number and the operator's contact details.
- You still need to collect identification details from foreign guests and report them to SIBA within the legal deadline. With nobody at the door, that collection has to happen before arrival.
The Most Common Options
Key Box
A small combination box holding a physical key.
- Pros: cheap, needs no battery or internet, works with any lock.
- Cons: the code is usually fixed, and changing it means going to the property; if the key is not returned to the box, the next guest cannot get in; a box on the façade marks the property as a short-term rental.
- Watch out: before fitting a key box on the façade or in common areas, check your building's condominium rules and the municipality's rules. Installing one in shared or public space may not be allowed.
Smart Lock
An electronic lock that opens with a code, card or app.
- Pros: lets you set a different code for each stay, valid only between check-in and check-out; some models log entries.
- Cons: higher cost; relies on batteries and, for many models, an internet connection; not every front door, especially in older Portuguese buildings, can take one.
- Watch out: always have a plan B (a physical key kept somewhere safe, or someone who can get to the property) for when the battery dies.
Building Door Plus Flat Door
In many buildings the problem is not just the flat's door: there is also the street door, a garage gate or a lift that needs a key. Every door adds a step where the guest can get lost.
- Rule of thumb: count how many doors the guest must open between the street and the bed. Each one needs its own instruction, with a photo.
Handover by a Third Party
A neighbour, a café or a key-handover service. It works, but depends on someone else's hours and availability. If you go this way, give the opening hours and say what to do if the guest arrives outside them.
A Code for Each Stay
Whenever your system allows it, use a different code per stay:
- Security: an old code shared by a previous guest stops working.
- Control: the code is only valid between check-in and check-out time.
- Clarity: the guest gets a code that is theirs, not a generic one that may have changed.
The weak point of per-stay codes is delivery. The code has to reach the guest at the right time: not too early (they forget it) and not too late (they are already at the door with no mobile data).
How to Explain Arrival to Your Guests
Most self check-in problems do not come from the lock; they come from the instructions. A few rules that prevent midnight phone calls:
- Send the instructions before the trip, and again on arrival day. Many guests land without mobile data or with a nearly flat phone.
- Write them step by step, in the order the guest will do things: where to park, which door is the building's, which floor, where the box or lock is, the code, how to lock the door from inside.
- Use photos of each door and of the exact spot where the box is. "Next to the door" is ambiguous; a photo is not.
- Give the exact address and a map pin, especially on streets with confusing numbering or rural properties without a street number.
- Explain what to do if something fails: who to call, which number, and when. Include the national emergency number (112).
- Translate. A tired guest in a foreign country, at night, reads best in their own language. If you host French or Spanish guests, English-only instructions are not enough.
- Explain check-out: where to leave the key, or whether simply closing the door is enough.
A Guide per Stay, With Step-by-Step Instructions
Many hosts send arrival instructions in a long email, a booking-platform message or a generic PDF. The trouble is that the information ends up scattered, and the guest has to hunt for it at the moment they have the least patience.
An alternative is a dedicated digital guide for each stay, with arrival instructions in the right order, the photos, the house rules and the contacts, all behind a single link the guest opens on their phone. That same guide is also where guests can enter their identification details before they arrive, which solves SIBA data collection when nobody is at the door.
How ciceroni Helps
ciceroni is not a lock and does not manage access codes. What it does is organise the communication around check-in. Each stay gets its own digital guide, in Portuguese, English, French and Spanish, where the host adds arrival instructions with the steps and photos they choose. Guests can fill in their details in the guide before arrival, which helps the host prepare the list for SIBA; the host still submits it. If guests have questions on arrival, an AI concierge answers on WhatsApp or in the guide, at any hour, using only what the host wrote, and passes anything it cannot resolve to the host. It is free during launch. See also our house rules template in four languages.
FAQ
Is check-in without the host present allowed for Alojamento Local?
Yes. The reception service can be provided in person or remotely, by phone or electronically, as long as the guest can contact reception and has the national emergency number and the operator's contact details.
How do I collect SIBA data if I am not there at check-in?
Ask for it before arrival, through a form or a digital guide where the guest fills it in from their phone. Submitting to SIBA remains the host's responsibility, within 3 business days of check-in.
Is a key box or a smart lock better?
It depends on the property. A key box is cheaper and needs no battery, but the code is usually fixed. A smart lock allows a code per stay, but costs more and needs a plan B for battery or connection failures.
Can I put a key box on the building's façade?
Check your condominium rules and your municipality's rules first. Installing one in common areas or public space may require permission or may not be allowed.