What to do with Wyoming plates after moving to Mississippi

Complete the replacement record

Apply through the county Tax Collector within 30 days after moving while the prior registration remains valid. Mississippi publishes a $250 penalty in addition to standard late-registration penalties for missing the new-resident deadline.

Maintain Mississippi liability coverage and keep the insurance card in the vehicle. The state notes that proof is required for operation even though registration offices do not enforce it as a filing prerequisite.

Do not plan on a routine Wyoming move-out refund

After the destination registration is active, do not treat the move itself as a registration-refund claim. Wyoming law says fees are not refunded unless they were paid and collected by mistake, except where another law provides otherwise. Keep the new registration with the old payment record and pursue a refund only if a documented exception applies.