A customs representative is the legal representative of the customs agent to promote on his behalf and representation the customs clearance of goods. The requirements to be a representative are: Have power of attorney and customs experience of more than two years. Approve the exam determined by the SAT. Promote customs clearance on behalf of a single customs broker. The representative is jointly and severally responsible for the payment of taxes on foreign trade and other contributions, as well as for the countervailing duties that are caused on the occasion of the customs operation, for the acts that they personally carry out in accordance with the mandate.