Belgium Visa for Thai Visitors: Family and Partner Visits (2026 Guide)

Would you like to invite a family member, your partner or a friend from Thailand to Belgium? Thai citizens need a short-stay Schengen visa (type C) for a visit, applied for in person at TLScontact in Bangkok. The key document from the host is the Annex 3bis, a formal undertaking signed at your Belgian commune to cover the costs of the stay. This guide follows the Belgian Embassy in Bangkok’s official checklist for 2026.

1. Which visa, and who can apply?

• For visiting family, a partner or friends living in Belgium, for up to 90 days
• Apply to Belgium when Belgium is the main destination of the trip
• Visiting an unmarried partner is possible, with proof or a history of the relationship
• The purpose cannot be changed and the visa cannot be extended later; a new application is needed
• If you are married and want to live together in Belgium, a long-stay visa is needed: see our family reunification guide

2. The Annex 3bis (for the host)

The Annex 3bis (formal undertaking of financial support) is an official document from your Belgian commune in which you commit to cover all costs of your guest’s stay.

• You sign it at the commune / gemeente where you live
• Your guest needs the original for the visa application, so send it by post in good time
• Add proof of your income (payslips or tax assessment), your family composition and a copy of your ID card or residence permit
• If your guest pays for everything themselves, they must show sufficient funds of their own instead

3. Documents (Belgian Embassy checklist)

Your guest’s documents (in Thailand)

• Visa application form from visa-on-web, printed, dated and signed, with one colour photo 3.5 x 4.5 cm, white background
• Original passport valid at least 3 months after leaving the Schengen area, with 2 blank pages, plus copies of the data page and all used pages
• Proof of own funds: payslips, bank statements or credit card
• Proof of return: employer letter with approved leave, school letter, company registration, property or dependants in Thailand
• Travel medical insurance issued in Thailand, at least €30,000, valid in all Schengen countries for all travel dates
• Return flight reservation
• Minors (under 18): copy of the birth certificate, plus consent from the parent(s) not travelling and a copy of their passport

Your documents (the host in Belgium)

• An invitation letter with the details of the trip
• A copy of your ID card or residence permit (front and back)
• Proof of the relationship: birth or marriage certificates for family; proof or history of the relationship for a partner
• Accommodation: your confirmation that your guest stays with you (can be in the invitation letter) or a booking
• If you cover the costs: the original Annex 3bis with your income proof, family composition and ID

The embassy asks for A4 pages and clearly readable copies, in the order of the checklist. Thai-language documents must be translated into English; no embassy legalisation is needed for a visit visa.

4. Step by step

1. The host signs the Annex 3bis at the commune (if covering the costs) and sends the original, with the host documents, to Thailand
2. Translate the Thai documents into English (for example proof of relationship and employment letter)
3. Complete the visa-on-web form, then print, date and sign it
4. Book an appointment at TLScontact Bangkok
5. Your guest applies in person with the documents in the checklist order, pays the fees and gives photo and fingerprints
6. Decision: usually around 15 days, sometimes longer
7. Passport collection once notified
8. Carry copies of key documents: border police may ask for proof of accommodation and funds when entering the Schengen area

Do it yourself, or with Spoyzy?

	On your own	With Spoyzy
Annex 3bis	You must find out what your commune asks for	We explain it to you in English, French or Dutch
Translations	Unsure which documents to translate	We translate the Thai documents into English
Funds and return guarantees	Unsure whether it is enough	We check and advise before submission
Checklist order	Missing or misplaced documents	We organise the file in the embassy’s order

5. Common reasons for refusal

• Sending a copy of the Annex 3bis instead of the original, or sending it too late
• Weak proof of return to Thailand, which the embassy weighs heavily
• Thai documents not translated or only partly translated
• Travel insurance that does not cover all dates or is below €30,000
• A partner visit without proof of the relationship

6. How Spoyzy helps

We regularly help Thai visitors join family and partners in Belgium, in Thai, English, French and Dutch.

• Full document check against the Belgian Embassy checklist
• Explaining the Annex 3bis and host documents to you
• Help with the invitation and cover letters
• Translation of Thai documents into English
• Help with the visa-on-web form and the TLScontact appointment

Read also: Schengen visa from Thailand: complete guide and France visa for Thai visitors

Frequently asked questions

How far in advance should my guest apply for a Belgian visa?

At the earliest 6 months and at least 2 weeks before travel, but start earlier: you need time to sign the Annex 3bis and post the original to Thailand.

Can my unmarried partner visit me in Belgium?

Yes. The Belgian Embassy accepts proof or a history of the relationship, such as photos together, message history and previous visits.

Is the Annex 3bis always required?

No. It is used when the host covers the costs. If your guest pays everything, they must show sufficient funds of their own.

Can the visa be extended in Belgium?

No. The embassy states that the visa cannot be extended and the purpose cannot be changed; a new application is required.

Is the visa fee refunded if the visa is refused?

No. Read the reasons in the refusal letter, then appeal within the deadline or reapply after fixing the issues. We can review the refusal and prepare a new file.