How long does the approval letter take, and how early can I apply?

Dear Ajay Sutar,

Thank you for contacting us.

Please be advised that what we provide is not a visa. It is an approval letter that allows you pick up your visa upon arrival to Vietnam.

You can apply for the approval letter now from the Philippines for the  entry to Vietnam in May 2018, however, please make sure the plan will  not change because the approval letter cannot be amended once it is  issued.

Have a good day!