Hi, can someone please advise how soon before planned travel I can go to immi office to apply for a re-entry permit ? I’m aware I have the option of applying at the airport, but prefer to get it sorted earlier. One less thing to stress about on the day of travel.
TLDR : Answer Summary
You can apply for a re-entry permit at the immigration office anytime before your planned travel. The expiration date of the permit will match the expiration of your permission to stay in Thailand. If you are unsure of your departure date, you can enter any future date on the application form.