New Vegas passport

A passport is a miscellaneous item in Fallout: New Vegas.

Characteristics
You use it to get into the New Vegas Strip, and possibly other places. This can be obtained by completing a series of quests for the Kings located in freeside. On completion of the quests The King gives you a couple options for a reward and one of them is to get a free passport at Mick and Ralph's store located by Freeside East Gate, otherwise the passport is 500 caps.

However, the player can still get into the Strip as long as he or she can pass the credit check of 2000 caps.

A Strip Passport can also be located in a cemetery around 15 squares due west of New Vegas, open the grave in the far left corner of the cemetery and as well as a few guns, a passport can be found.

Note: A passport is not required if you enter the strip via the monorail at the NCR controlled MacCarren Airforce Base.