Multiple entry visas are of specific kind where the individual holding this visa can enter a particular country multiple times within a certain interval of time. These kinds of visa are usually valid for a certain interval of time. The validity period of the visa determines how long an individual can re-enter a country. Multiple entry visas do have unique set of requirements. It may include several factors including the time duration before re-entering the country, maximum time of stay in the country and other reports as well.