If any of your own personal data has changed, do not opt for this alternative. You need to always refuse offers of assistance and head straight to the immigration office. What you ought to be concerned about is you have the critical information about the letter. Customs allowances into your house country will be contingent on where you reside. Speak to the office of the Registro Civil in the jurisdiction in which you intend to go married for complete details about the requirements. If you don't have the right authorisation you won't be permitted to travel to or transit through the united states.