A single-entry visa is a travel permit that allows the holder to enter the destination country only once during a specific time period. Once the traveler has arrived in the country and cleared immigration, the visa cannot be used again. If issued as a separate document to the individual’s passport, it is still important to keep the visa for the duration of the stay in the foreign country. This is because it proves that the visitor is authorized to be in the country. After departing from the country, a single-entry visa ceases to be valid. If the traveler wishes to return, they must apply for a new visa. Single-entry visas are usually the cheapest and fastest visa to obtain.

In contrast, a multiple-entry visa allows the holder to enter and leave the destination country multiple times during its validity without applying for a new visa or travel registration. The exact terms of multiple-entry visas vary depending on the country of issue. In many cases, the number of entries is unlimited while the visa is still valid. This means that the holder can travel to the destination country as many times as they want within the validity period of the visa. Multiple-entry visas cost more than single-entry visas, but both the price and visa types differ from country to country.