An entry approval letter is an official document issued by the Vietnam Immigration Department, allowing foreigners to enter Vietnam for various purposes such as tourism, business, visiting relatives or investment. This is an important and necessary step to legally enter Vietnam, which facilitates foreigners comply with Vietnam's current legal regulations. Applying for an entry approval letter for foreigners a process that requires compliance with legal regulations. In Ho Chi Minh and Hanoi, this process includes many steps from preparing documents, submitting applications, to receiving results. First, foreigners need to prepare necessary documents such as passport, application forms, and other related documents depending on the visa type. Proper application not only helps ensure the process goes smoothly and quickly, but also helps avoid legal problems that may arise due to omissions or errors in documents. Therefore, to apply for an entry approval letter, what requirements do foreigners need to meet? How does the procedure work? What documents do companies and foreigners need to prepare? All details will be answered by Visa5s.com in the article below.