CDC Dog Import Form
A free online form completed by the person bringing the dog into the US. Each dog requires a separate form. After submitting, you receive a receipt by email — print it or show it on your phone to US Customs. For dogs from Costa Rica (a CDC low-risk country), the receipt is valid for 6 months from the date it is issued and can be used for multiple US entries from the same departure country. You can complete the form on the day of travel or up to 6 months in advance.
APHIS Screwworm Inspection Certificate
Costa Rica is a screwworm-affected country. A full-time salaried veterinary official from the region of origin must certify that the dog was inspected and found free of screwworm within 5 days before shipment to the US. This can be a standalone document or incorporated into the origin country's official export health certificate.