The registrar cannot register a domain without the registrant's data. Otherwise, the domain will be available for others to order.
You need to specify the zip code and address for international domains. If this zip code doesn’t exist or it doesn’t match the address, the registrar will reject the registration application. According to the rules of service for international domain zones, you need to confirm your contact information after registering a domain!
You will be sent an email to verify the data specified in the contacts. This letter will contain a link to verify the information. You just need to click the link and the information will be verified. If the domain owner doesn’t verify the information, the domain will be blocked by the registrar.