A Customs Request is a document that is required when entering a country. It is usually filled out by the traveler and submitted to the customs office of the destination country. The term 'VISA' is an acronym for 'VISITOR's Immigration Status Authorization' and is a four-letter word used to describe the type of document needed to enter a country. A VISA is typically issued by the government of the destination country and is required for travelers who wish to enter the country.