Drive to Mexico with paper plates
Crossing an international border in a vehicle wearing temporary registration requires more attention than a routine domestic road trip. Paper plates identify a recently purchased or newly registered car, but they do not automatically guarantee acceptance at a Mexican port of entry or during an inland traffic stop. The central issue is whether the temporary permit, the supporting ownership documents, and the driver's conduct satisfy the applicable jurisdiction on both sides of the border. Because vehicle-import rules and roadside enforcement can differ from US state practice, a temporary tag should be treated as one part of a much larger documentation picture rather than as a complete travel credential.
Essential answer
You can generally drive to Mexico with paper plates if the temporary registration is valid in the issuing state and you also carry the documents Mexican authorities expect for a privately owned vehicle. The paper tag shows current US registration status, but the stronger question is whether the vehicle itself may enter under Mexico's rules for foreign cars. Temporary plates do not replace the title, registration receipt, financing permission, or the driver's passport and entry permit. A missing import document can create a more serious road restriction than the style of the plate on the bumper.
The temporary plate also affects how a reporting authority views the vehicle during an enforcement encounter. Officers in Mexico may be less familiar with another country's temporary formats, so clear supporting proof becomes important. The driver's conduct, the condition of the tag, and the match between the vehicle identification number and the paperwork all matter more than the plate material. Paper plates can work for border crossing and inland travel when they are legible, current, and backed by a complete ownership file; without that, they invite delay or a notice of violation that would not occur with permanent metal registration.
