Apostilled documents in Cardiff for use in Mongolia

A Cardiff apostille for Mongolia vouches for the signature on the page, not for the story the page tells. Since 2009 that one mark is all a Mongolian desk needs.

Cardiff → 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 18 August 2026

Complete Guide

A Cardiff document read in Mongolia

What the apostille certifies, why one mark closes the file, and the three things it cannot fix.

In this guide

The narrow claim on the certificate
Mongolia inside the Convention since 2009
Getting a sheet the office can mark
Three things the slip will not fix

The narrow claim on the certificate

An apostille is a printed slip fastened to your paper. It names the official who signed below it, gives the post that person held, and confirms the seal beside the name. It does not read your sentences, test whether they are correct, or ask what you mean to do with them. Its claim is narrow on purpose.

That narrowness is what makes the treaty work at all. A clerk in Ulaanbaatar has no way of knowing how a Welsh registrar signs, or what a British court seal looks like. The slip answers that one question for them, in a form every member country has agreed to read, and the rest of the file stays theirs to judge.

Mongolia inside the Convention since 2009

Mongolia joined the Hague Convention in 2009. Once two countries sit inside the same treaty, each takes the other's certificates as they stand, and nobody has to walk a file round an embassy first. So an apostille from United Kingdom to Mongolia is the finished article: one slip, fastened in Britain, read on arrival.

Getting a sheet the office can mark

Because the mark fastens to a signature, the sheet you send has to carry one. Cardiff Register Office at City Hall, Cathays Park reissues birth, marriage and death records as certified copies, each signed in the usual way, and a copy from there is marked exactly as an older certificate would be.

The marking itself happens at the FCDO Legalisation Office in Milton Keynes. That office works entirely by post, so there is no counter in Wales to walk into and no slot to book. The charge is fixed per document, which turns the size of your bundle into the only real cost decision you make.

Three things the slip will not fix

It will not correct an error already printed on your document. A misspelt surname or a wrong date stays as it is, and the slip then proves only that a real registrar signed the misprint. It will not turn your words into another language. And it will not make a paper nobody asked for suddenly count, so start from the list you were given rather than from the folder you already keep.

Frequently Asked Questions

Cardiff → Mongolia apostille FAQ

What does the certificate actually claim?

It names the person who signed underneath, states the post that person held, and confirms the seal beside the signature. That is the whole of its claim. It says nothing about whether the words on your document are true, and nothing about the decision you are hoping for. A Cardiff apostille for Mongolia is proof of where a paper came from, not a ruling in your favour.

Is a second office involved?

None is. Mongolia joined the Hague Convention in 2009 and the United Kingdom has been in it far longer, so each side reads the other's certificates without an embassy standing in between. Document legalisation for Mongolia therefore ends the day the marked bundle drops back through your door. Budget for one round trip in the post rather than two.

What is the charge on the British side?

£45 per document on the standard postal service, or £40 per document on the next-day service that registered businesses can use. The charge lands on each sheet, so three certificates in one envelope carry three charges. Knowing what you need for an apostille for Mongolia before you order keeps that bill down to the papers somebody actually asked to see.

Can a copy go instead of my own certificate?

A certified copy is the wiser choice. Cardiff Register Office prints fresh copies of civil records from the same register, and the Legalisation Office treats one exactly as it treats a first certificate. Your own document then stays in the drawer at home, and the sheet crossing the country is one that can be reordered if a post room loses it.

Which papers usually travel this way?

Mostly personal ones — birth and marriage records, degrees, transcripts and police records — with company files following less often. The subject matter makes no difference to the route, because the mark fastens on to the signature rather than on to the topic. A degree and a death certificate go through the same office, at the same charge, in the same envelope size.

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 Cardiff documents are certified and apostilled

These are two different offices doing two different jobs. The local register office issues the certified copy of a Cardiff 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.

Cardiff Register Office

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

City Hall, Cathays Park, Cardiff CF10 3ND

Directions →

FCDO Legalisation Office

Issues the apostille — UK-wide, by post

PO Box 6255, Milton Keynes MK10 1XX

Directions →

Document Types