I have confirmed booking for a stay in Spain. Host just sent a link to some site that asks me to enter several details including name, passport number etc. He says this is legal requirement and will be sent for police registration. Otherwise my booking will be cancelled. To be fair, he had mentioned this as rules in his listing but never mentioned that a third party app would be collecting personally identifiable information. The link to fill up the form belonged to some partee.es website.
Is this normal? Should I fill it?