Domovní kniha (house book) is a record of people to whom the ubytovatel (accommodation provider) has given housing: who lives at the address, from what date, and until what date. Keeping this record is the responsibility of the accommodation provider, not the resident.
Why it's not just a piece of paper
A record with the accommodation provider is where your registered address comes from. It is connected to:
- fulfilling the registration duty under § 93 (3 working days for third-country nationals) — the accommodation provider does it for you;
- 🔴 the fact that you are listed at a real address, not at the OAMP address.
🔴 The chain that breaks your status
The accommodation provider did not register you / deregister you, or the police did not find you at the address → the Ministry of Interior cancels the address → assigns the OAMP address → after 90 days, temporary protection ends by law, without a decision and without notification.