About the document
- Country:
- Thailand
- Category:
- Work permits
- How to fill:
- Chat in any language → original form → PDF
- Price:
- form free · chat ฿149 per document
- Last updated:
What the form is
Form บต.35 / WP.35 is the “Work Duration Extension Request Form for a Foreigner Performing the Works which can be Characterized as Necessary, Urgent or Ad-hoc pursuant to Section 61”. It is issued by the Department of Employment (กรมการจัดหางาน), Ministry of Labour of Thailand.
Section 61 of the Royal Ordinance on the Management of Foreign Workers’ Employment B.E. 2560 (2017) lets a foreigner perform necessary or urgent work without a regular work permit after notifying the registrar. If the work cannot be finished within the notified period, form BT. 35 is used to request an extension. The instruction sheet of the form states that the extension is not longer than 15 days.
The form is bilingual (Thai and English): particulars of the foreigner and passport, date of entry, number and date of the notification receipt (form WP.36), the original end date, the requested extension, the employer and the address of the place of work, and the list of attached documents.
Who files it and where
The foreigner performing the urgent work files it. If the foreigner and the employer cannot submit in person, the instruction sheet requires a power of attorney from both with a 10-baht duty stamp; the grantee must show the original ID card to the officer.
The request is addressed to the registrar (นายทะเบียน) of the Department of Employment. It is usually filed where the urgent-work notification was filed; please confirm the exact office there. Contacts printed on the form: doe.go.th/alien, tel. 0-2248-7202, 0-2354-0116.
Documents to attach
- form WP.35 with one 3×4 cm photograph;
- a letter explaining why the urgent or ad-hoc work needs to be extended;
- a copy of the notification receipt for urgent work (form WP.36);
- a copy of the passport (photo page and entry visa page);
- a power of attorney with a 10-baht stamp if the foreigner and the employer do not submit in person;
- for a foreign employer: a copy of their work permit (if they do not work in Thailand — a power of attorney certified by a notary public and the Thai embassy); for a Thai employer: a copy of their ID card.
This list is taken from the instruction sheet of the form itself. Office requirements may differ — check in advance.
Processing time and fees
The instruction sheet says that once the application is complete, the process finishes within 1 working day. No fee is printed on the form — please check with the Department of Employment office.
How to fill in BT. 35 with FoxDocs
- Open the chat on this page and write in any language what work needs to be extended and for how many days.
- Answer the assistant’s questions or send a photo of your passport page — the data goes into the right boxes in Latin letters and the title is circled.
- Check the fields and download the PDF.
- Print, attach the photo, sign and submit it to the registrar with the documents.
Sources
Form บต.35 / WP.35 of the Thai Department of Employment (doe.go.th); Section 61 of the Royal Ordinance on the Management of Foreign Workers’ Employment B.E. 2560 (2017), as amended. Checked on 2026-10-08; this is not legal advice.