Checking Visa Stamps After Interview

person's hand stamping with approved stamp on certificate document public paper at desk

US Tourist Visa stamps are generally valid for multiple entries into a country and have an expiration date. The authorized stay duration is the amount of time you are allowed to spend in a country between each entry. For example, if your visa stamp expires on December 31st and your authorized stay duration is 90 days, you would need to leave the country on or before September 29th so that you could come back on December 31st and not exceed your authorized stay.