I applied and get the visa approval letter for 1 month (from April 13 to May 13). But my plan changed and I will enter Vietnam about 5 days later (April 18). Does this approval letter work? If so, will I have 1 month in Vietnam or I must exit Vietnam by May 13 if I use this letter? Kikata
Be kindly informed that you can use this approval letter to enter Vietnam on April 18 since you are allowed to arrive in Vietnam later than the arrival date issued in your visa approval letter. But please keep in mind that your visa is valid during the period issued in your visa approval letter, not 30 days from you actual arrival date.
We hope that this information is clear to you.
Wish you an enjoyable trip to Vietnam!