An H-1B worker's visa is normally issued for the period of validity of the approved H-1B petition, as indicated on form I-797B.In some instances, the visa may be issued for a shorter period of time, based on reciprocal treatment by the alien's country of U.S. worker. In either case, the H-1B worker is likely to need  renewal of his or her visa if he or she will remain in the united states up to a six year maximum period of eligible stay. If the H-1B worker never leaves the U.S. during the six year period, a new visa is not required. If, however needs to travel abroad after the expiration of his or her original H-1B visa, a new visa must be abstained in order for the H-1B worker to re-enter the U.S. Visa re-issuance can be in one of the three ways: