Apostilled documents in London for use in Mongolia

London apostille for Mongolia: An apostille from the Legalisation Office (Foreign, Commonwealth & Development Office), processed end to end.

London → Mongolia

Hague Members

Destination Mongolia

Destination status Hague Convention member

Issued by The Legalisation Office (Foreign, Commonwealth & Development Office)

Standard turnaround Up to 25 working days, plus postage

Information validated 21 August 2026

Complete Guide

London Apostille Mongolia - Document Legalisation Service

Get your UK documents legalised for use in Mongolia with a London apostille. We guide you through every step for smooth processing in Mongolia.

In this guide

Apostille vs. Embassy legalisation for Mongolia
Mongolia's Hague status & what it means
The London → Mongolia route step by step
What you need for an apostille for Mongolia
Cost & timing for this route

Apostille vs. Embassy legalisation for Mongolia

If you need to use British papers in Mongolia, you need the right stamp to prove they are real. Since Mongolia joined the Hague Apostille Convention in 2009, the apostille from the UK is all you need. This is a special certificate that goes on your original paper, showing officials in Mongolia that your document is genuine. An apostille issued in London for use in Mongolia counts the same as one issued anywhere else in the country, since a single central office handles the stamp. You do not need to visit the Mongolian Embassy in London or get any extra stamps beyond the apostille. When Mongolian officials see this mark, they accept the paper as valid for whatever you need it for - whether that's showing your birth certificate, company papers or other official records.

Mongolia's Hague status & what it means

Mongolia has been part of the Apostille Convention since 2009, which makes things much simpler for anyone presenting UK documents there. This means that once your paper has the UK apostille, it is automatically valid in Mongolia without further checks. You can use any document that has been properly certified with this mark across all of Mongolia's government offices. The apostille confirms that the signature on your document is from a recognised British authority, so Mongolian officials can trust it. There is no need for additional verification at the Mongolian Embassy or through any other legalisation route.

The London → Mongolia route step by step

To get your documents ready for Mongolia, start by ensuring you have the right version of your paper. For birth, marriage or death certificates, you will need a certified copy - the Westminster Register Office can issue these, and the address is 317 Harrow Road, London W9 3RJ. This lets you keep your original safe at home while the certified copy goes through the apostille process. Once you have the correct version of your document, you send it to the Legalisation Office of the Foreign, Commonwealth & Development Office for the apostille for Mongolia. The office is at PO Box 6255, Milton Keynes MK10 1XX, and they will attach the apostille to your paper. After that, it's ready to be used in Mongolia without any additional steps or stamps required. This is the standard document legalisation for Mongolia route for anyone sending papers from London.

What you need for an apostille for Mongolia

Here is what you need for an apostille for Mongolia: an original or properly certified document, the correct signature from a recognised UK authority, and any translation the receiving office asks for. The exact papers needed depend on what you need the document for in Mongolia. The one constant is that whatever you send must be an original or a properly certified copy. The Westminster Register Office in London can provide official copies of civil records like birth or marriage certificates if you do not want to risk your only original. After the apostille from United Kingdom to Mongolia has been added, your document is considered legal for use there. The entire process can be done by post, with no need to visit any offices in London. The completed paper is returned to you by recorded delivery when finished.

Cost & timing for this route

An official fee applies for the apostille itself through the Legalisation Office near London. The standard postal service takes up to 25 working days, plus postage time each way. A next working day option exists for registered businesses only, so most personal applicants should plan around the standard figure. There is no difference in the acceptance of the apostille in Mongolia based on which service you pick - both have equal standing. Include in your planning the time needed to obtain any necessary certified copies before submitting for the apostille. Once the document is back with you, it can be used in Mongolia right away.

Frequently Asked Questions

London → Mongolia apostille FAQ

What does the London apostille for Mongolia mean in practice?

A London apostille for Mongolia is a certificate that validates the signature and seal of a UK document so it can be used in Mongolia. This happens because Mongolia joined the Hague Convention in 2009, meaning it accepts this simplified form of legal validation. The Legalisation Office(Foreign, Commonwealth & Development Office) in Milton Keynes attaches this stamp to your paper after they confirm the signature is genuine. You do NOT need to visit an embassy in London for further stamps - the apostille is enough under the treaty. The whole thing is sent and handled by post, so you won't need to deliver the paper in person to any government building. Only a certified copy of a civil record from Westminster Register Office can be used if you want to keep your original certificate at home.

Will my UK document work in Mongolia after it gets an apostille?

Yes - the apostille means that Mongolian authorities must accept your UK document as properly verified. Since 2009, when Mongolia joined the treaty, an apostille has been the accepted international standard for cross-border papers. The receiving office in Mongolia has the format to check the stamp's reference number in the FCDO's online database. One thing to note is that all official content must be fully understandable to Mongolian officials - documents must either be in Mongolian or have a certified translation. The Westminster Register Office in London produces the certified copies many people need when hiring a translator.

How does getting the stamp work in practice?

Getting the stamp involves preparing your document and mailing it to the designated office. First, make sure your original is signed by the correct UK authority - not all offices issue papers that can be apostilled later. If you hold a civil record like a birth certificate, the Westminster Register Office can issue you a certified copy so the original never needs to leave your possession. Then post everything to the Legalisation Office at PO Box 6255, Milton Keynes MK10 1XX with a covering letter and payment. They check the issuing authority's signature against their records and fix the official sticker. The office handles all submissions by post so you do not need to take time off work.

What are some common mistakes people make with this route?

A frequent error is missing the need for translation - Mongolian offices require any non-Mongolian text to be professionally rendered. Another misstep is sending a document signed by an unauthorised person - only certain organisations like the General Register Office can issue papers that can be apostilled. Some applicants wrongly assume their degree certificate or driving licence can be certified as-is, when sometimes they need re-issuing by the original authority first. Others lose track of time and realise too late that rush services cost more. The safest approach is to identify what stamp you need and in what language, plan for the official fee, and keep a clear file of each step.

What exactly does Mongolia accept?

Mongolia accepts British documents bearing the Hague apostille without any further stamps or embassy visits. This includes birth, marriage and death certificates, degree certificates, and court orders. The document and its institutional signature must be verifiable by the UK Legalisation Office's system - informal papers and photocopies without original seals will be rejected. If your document isn't in the official languages of Mongolia, you need to have it fully translated by a professional who can add a certified copy of the original and the stamped apostille. A signed confirmation from the translator attaches the two parts together. Always deal with the Westminster Register Office or other registry for fresh copies rather than risking originals.

How It Works

Four steps to your Mongolia-ready apostille

No office visits, no queues. The entire process is handled remotely and you track every step in real time.

Prepare your document

Obtain the original document (or a certified copy) you need to use abroad, and check whether it must be notarised first.

Confirm the requirements

Verify the document is eligible for an apostille.

Submit to The Legalisation Office

The apostille is issued by The Legalisation Office, the competent authority. The government fee is £45 / document (standard postal); £40 / document next-day (registered businesses).

Receive your apostille

The authority attaches the apostille certificate, making the document valid abroad with no further embassy legalisation.

Where to go

Where London documents are certified and apostilled

These are two different offices doing two different jobs. The local register office issues the certified copy of a London birth, marriage or death record — check its current appointment rules before going. The apostille itself before use in Mongolia comes from the FCDO Legalisation Office, the UK's single competent authority, which accepts documents by post rather than in person.

Westminster Register Office

Certified copies of civil records (birth, marriage, death)

317 Harrow Road, London W9 3RJ

Directions →

FCDO Legalisation Office

Issues the apostille — UK-wide, by post

PO Box 6255, Milton Keynes MK10 1XX

Directions →

Document Types