There are two versions. The blue book (Thor Ror 14) is for Thai nationals and foreigners with permanent residence. The yellow book (Thor Ror 13) is for other foreigners. A newly transferred condominium comes with a blue book, which is usually left empty when the owner is foreign.
Ownership is proved by the title deed registered at the land office, never by the house book. The yellow book is still useful: it is accepted as proof of address when applying for a driving licence, registering a vehicle or dealing with banks and utilities. Applying means a visit to the district office (amphoe, or khet in Bangkok) with translated and certified documents and, in many districts, witnesses. Requirements vary from office to office.
The book also has tax consequences. The main-home exemption from land and building tax depends on the owner being named in it on 1 January, and one exemption from specific business tax depends on the seller having been registered there for at least a year. See property taxes and buying costs and banking and daily life.
