Form BT. 37 (WP. 37): receipt of the request to extend urgent or ad-hoc work under Section 61

Form บต.37 (Form WP. 37) is the “Receipt Confirmation Form for the Work Duration Extension Request for a Foreigner Performing the Works which can be Characterized as Necessary, Urgent, or Ad-hoc pursuant to Section 61” of the Department of Employment (กรมการจัดหางาน), Ministry of Labour of Thailand.

The registrar (นายทะเบียน) issues it when a foreigner who has already notified urgent work under Section 61 (BT. 34, receipt BT. 36) asks with form BT. 35 to extend the work period. The Department publishes it as a fillable PDF, so the data can be typed in advance.

• the data are the same as in BT. 35 and BT. 36: the foreigner, the number and date of the BT. 36 receipt, the employer or hirer, the place of work and the extension period;
• it is handed in together with BT. 35 to the registrar of the employment office that accepted the notification; ask the office whether a pre-filled receipt is needed;
• the receipt number and date, the signature, name and position of the registrar are filled in by the office;
• no fee is printed on the form — check with the office.

• the foreigner's name, nationality and passport (or document in lieu of passport) number;
• the date of the original notification and the work commenced;
• the employer or hirer and the number and date of the BT. 36 receipt;
• the work to be extended and the address and phone of the place of work;
• the extension period in days with start and end dates (no more than 15 days under Section 61).

1. Answer the chat questions about the foreigner, the BT. 36 receipt, the employer and the place of work.
2. The assistant counts the extension days and writes dates as DD/MM/YYYY.
3. Download the PDF, check it and submit it with BT. 35 — the registrar completes the rest.

Official Department of Employment file: https://www.doe.go.th/prd/download/download_by_pool_file/62578 (checked 2026-10-08). This is not legal advice.