I just received an airbnb message as follows:
"Before your arrival, I would like to inform you that from 1 September 2021, all guests will be required to provide personal data, your travel document must be scanned.
This information collection is a strict legal requirement by the Hungarian government and valid for all hostels, hotels, private accommodation. I send you the links where you can read about the data provision, which is mandatory for hosts."
Has anyone gone through this process? The host didn't actually tell me what kind of travel documents, nor where to submit them.