A Work Visa
Work visas are permits that allow individuals to travel to another country to work there.
In most cases, a work visa or permit is mandatory to accept employment in a foreign state. There are some exceptions, such as in blocs of countries with a policy of freedom of movement (like the EU).
Work visas are usually temporary, but may be renewed. Some countries issue permanent work permits or allow holders to change to a residence visa after a certain period of time.
Various countries have a different system in which foreign nationals must first apply for a long-stay visa and then obtain a work permit once they arrive in the country.
In some cases, work visas are highly specific and are granted for a particular job. Under the terms, the holder might not be able to take any other job in the same country apart from the one authorized by the visa.
In these cases, the prospective employer based in the destination country usually has to sponsor the visa application and send a cover letter.
Some countries issue more general work visas that permit the holder to take any job in the country and work for the duration of the visa’s period of validity.