Tenants need to show valid documents, such as a passport or residence permit, to prove their immigration status. Checks must be made on all adult tenants before the start of a new tenancy, regardless of nationality. The checks can be done using the Home Office online service or by verifying original documents in person. Landlords can face penalties if they rent to someone without the right to rent in the UK. Some individuals, such as students or those with temporary visas, may have time-limited rights and need follow-up checks. Landlords must not discriminate against potential tenants when conducting these checks.