Just did quick search and found here entire list

https://www.barcelonatravelhacks.com/en/news/2024-tourist-data-collection-law

For some reason I couldn’t copy the text but copied from different website so this one may be incomplete

Details of the lessor company: Name or company name of the owner, CIF or NIF, municipality, province, landline and/or mobile phone number, e-mail address, company website and url.

• Establishment details: Type of establishment, name, full address, postcode, town and province.

• Tourists’ details: full name, sex, identity document number, type of document (ID card, passport, TIE), nationality, date of birth, usual place of residence (full address, town and country), landline and mobile phone, e-mail, number of tourists and relationship between tourists (if any of them are minors).

• Transaction data: Contract (reference number, date and signatures), contract execution data (date and time of entry and date and time of exit) and payment data (type, identification of the payment means such as card type and number, holder of the payment means, card expiry date and date of payment).

In addition, for non-professional accommodation some data varies, including full name, gender and ID of the owner of the property, as well as number of rooms or internet connection of the site.

In the case of car rental agencies, the data to be provided are similar to those for accommodation, but with the addition of the corresponding information on the main driver and the second driver (if applicable).