What exactly is self-check-in?
With self-check-in, the guest handles their own arrival - without you having to be there in person. Instead of an agreed handover appointment, the guest follows a guided flow: enter details, confirm identity, get access. The result is a contactless check-in available around the clock. You skip the key handover, and the guest skips the waiting around.
The four building blocks of a good self-check-in
A well-thought-out self-check-in is more than just a door code. It consists of four parts that work together:
- Data capture: The guest enters their details online before arrival.
- Identity verification: The ID is checked - important for security and, for foreign guests, for the guest registration requirement.
- Digital guest registration form: The data needed for the guest registration requirement (foreign guests) and the tourist tax is captured and stored in a legally compliant way.
- Access: Once the check passes, the guest automatically receives the door code or the door opens via smart lock.
Step 1: Make the door keyless
The centerpiece is a smart lock. Devices like the Nuki smart lock can be retrofitted to most doors without drilling - they sit on the inside, over the existing locking cylinder. From there you can open the door via an app, a numeric code, or time-limited access. That time limit is exactly the point: access is valid only for the booking period.
Step 2: Set up the online check-in
The guest should be able to enter their details conveniently in advance - on their smartphone, via a link sent after booking. This is where name, address and fellow travelers are captured and the ID is verified. Ideally this step is multilingual, so international guests can complete it without friction.
Step 3: Combine the registration form and ID check
To make the check-in not just convenient but also legally sound, the guest registration form (for foreign guests) and the identity check belong in the same flow - along with the details needed for the tourist tax. Make sure you collect only the data you truly need and delete it on schedule - more on that in our articles on the guest registration requirement (in German) and on ID copies and GDPR (in German).
Step 4: Unlock access automatically
Access is only released once data capture and identity verification are complete - the guest receives the code or the door opens. This order matters: it ensures no one enters the apartment before the capture is finished.
Always plan a fallback
Technology can fail - a dead battery in the smart lock, poor signal, an unsure guest. So always plan a Plan B: a key safe with an emergency code, a phone number someone actually answers, or a contact on site. That prevents the worst review of all - the guest standing outside a locked door at night.
Common pitfalls
- Too many steps: Every extra click costs you guests. Keep the flow as short as possible.
- No language options: International guests drop off when they do not understand the flow.
- Forgetting data protection: ID data must be stored encrypted and deleted automatically.
- No test run: Walk through the check-in yourself as a guest before you go live.
Everything from a single source
You can piece these building blocks together yourself - or use a platform that already connects them. Oasify brings the online check-in, ID verification, the digital guest registration form and the Nuki door unlock together in one flow: the guest checks in on their own, access is only released after a successful check, and the data is managed in a GDPR-compliant way.