A passport.
passport
Diplomat
Diplomat
The identification document that allows a person to enter lawfully into and work in the US is called a "Green Card" or Permanent Resident Card.
A travel visa is a document issued by a foreign country that allows a person to enter and stay in that country for a specific period of time for tourism, business, or other purposes. It is a form of permission granted by the government of the country being visited.
In general terms a professional who does this is called a "diplomat".
A travel document issued by the country a person is traveling to that grants to that country
A foreign diplomat is a person who represents their govenment in different countries. Also they can issue visas, and are slightly similar to a negotiator.
The name of the process is naturalization.
That person would be called a traitor.
It is a person who is a foreigner (not a citizen) who tours a country not native to that person.tourist travelling to and between foreign countries
It is a person who is a foreigner (not a citizen) who tours a country not native to that person.tourist travelling to and between foreign countries