What documents are needed for a 30-day extension of a 60-day visa exemption entry in Thailand?

After this one months extensiom . Is possible to fly to Vietnam and have 2 months when come to Thailand.. 2+1+2 = 5 months ?

Your passport, with the current visa-exempt entry stamp. 

• A completed extension application form: TM.7 (Application for Extension of Temporary Stay). 

• A recent passport-size photo (4 × 6 cm, colour) — generally taken within the last 6 months. 

• A copy of your passport’s bio page, and a copy of the page showing your visa-exempt entry/stamp. 

• If you received a paper arrival/departure card on arrival (historically called TM.6), bring a copy of it (or electronic arrival record if applicable). 

• Proof of where you are staying in Thailand — e.g. hotel booking, rental agreement, or address of your accommodation. Some immigration offices may also request the TM.30 (or proof your accommodation has been reported). 

• The extension fee of THB 1,900 (cash). 

When to apply: Typically, you should submit your extension request about a week before your 60-day stay expires. 

Good to know / Important caveats:

• The extension is not automatic — the extra 30 days are granted at the discretion of the immigration officer. 

• Have photocopies of your passport and entry stamp page ready — many offices will ask for them. 

• Some immigration offices will support on-site photocopy and photo services if you don’t have them ready.