Pet passports are part of the European Union (EU) Regulation on the movement of pet animals. This passport has replaced the existing Pet Travel Scheme (PETS) 1 certificate and is accepted for entry to the UK from other member states and from other qualifying countries. It has also replaced the PETS 5 and other documents that had been required to enter EU countries. PETS certificates can however still be used to enter or re-enter the UK until their expiration date. Certain non-EU listed countries may also issue a passport. Pets travelling on Pet Passports must  be treated against ticks and tapeworms before entering the UK. The treatment will be recorded in the passport. For dogs and cats with PETS certificates, an official tick and tapeworm certificate from a vet in the country in which the pet is treated is required. This certificate will only be available in certain countries.