Sooner or later, most newcomers from mainland China run into a form that asks for a “certified true copy” of a document, or a page that must be signed in front of a commissioner for oaths. If you have never dealt with this before, it can feel confusing. This guide explains, in plain terms, what a commissioner for oaths Singapore residents can turn to actually does, what certifying a true copy means, and when you are likely to need either service. It is general information only, not legal advice, so always check the current rules with the authority asking for the document or with a law firm.
What a Commissioner for Oaths Does
A commissioner for oaths is a person authorised to administer oaths and take statements for use inside Singapore. When a document says it must be “sworn” or “affirmed”, or when you need to make a statutory declaration, this is usually the person you go to. In practice, you sign or declare something in front of them, they confirm your identity, watch you sign, and then add their own signature and stamp to show the step was done properly.
Common situations where you may need one include:
- Statutory declarations, for example declaring your marital status, a change of name, or that a fact is true.
- Affidavits used in local court or administrative matters.
- Confirming that a copy of a document is a true copy of the original, for use within Singapore.
A commissioner for oaths does not check whether what you are declaring is true. Their role is to confirm that you appeared before them, that you understood you were making a formal declaration, and that you signed. The honesty of the content remains your responsibility, and making a false declaration is a serious matter.
Commissioners for oaths are commonly found at law firms, and many offer this as a quick counter service. You will need to bring valid photo identification, such as your passport or your identity card, and the complete document you intend to sign. Do not sign it beforehand, because the whole point is that you sign in front of the commissioner.
Certifying a True Copy
Certifying a true copy means having an authorised person compare a photocopy against the original document and confirm, in writing, that the copy matches. This is useful when an organisation wants proof of a document but you do not want to hand over the precious original, such as your passport, your degree certificate, or a marriage certificate.
You bring both the original and a clear photocopy. The certifier examines them side by side, then writes a short statement on the copy, usually along the lines of “certified to be a true copy of the original sighted by me”, followed by their signature, name, capacity, and the date. Some also stamp each page.
Who can certify a true copy depends entirely on who is going to receive it. Different bodies accept different certifiers, so the golden rule is to ask the receiving organisation first. Do not assume. A university overseas, a Singapore government agency, and a foreign embassy may each have their own list of who they will accept.
Notary Public and Overseas Use
Here is where many mainland newcomers get caught out. If your certified copy or declaration is going to be used outside Singapore, a local commissioner for oaths is often not enough. Documents heading abroad usually need to be handled by a notary public, and then possibly legalised further.
A notary public is separately appointed and authenticates documents for international use. If you are sending a document to China, to another country, or to a foreign embassy, you will frequently be asked for notarisation rather than a simple certification.
Beyond notarisation, some destination countries require an extra layer of authentication, sometimes called legalisation, before the document is accepted. The exact chain of steps depends on the destination country and the type of document. Because Singapore and China both have their own procedures, and because rules change, you should confirm the exact requirements with the party requesting the document, the relevant embassy, or a law firm that handles cross-border work. Getting the order of steps wrong can mean redoing everything.
Comparing the Services
The table below gives a rough, at a glance comparison. Treat it as a starting point, not a definitive rulebook, because the accepted process always depends on who will receive your document.
| Service | What it does | Typically used for | Usually accepted by |
|---|---|---|---|
| Commissioner for oaths | Administers oaths, takes declarations and affidavits, certifies copies | Local statutory declarations, affidavits, copies for use in Singapore | Singapore courts and local agencies |
| Certified true copy | Confirms a photocopy matches the original | Proving a document without giving up the original | Depends on the receiving body |
| Notary public | Authenticates documents for use abroad | Documents sent overseas or to embassies | Foreign authorities, embassies |
| Legalisation | Extra authentication layer after notarisation | Countries that require it before acceptance | The destination country |
Practical Tips Before You Go
A little preparation saves a second trip. Keep these points in mind:
- Ask the receiving organisation, in writing if possible, exactly what they need. The words “certified”, “notarised”, and “legalised” are not interchangeable, and using the wrong one wastes time.
- Bring the original document and identification every time. Copies alone are rarely enough.
- Do not sign anything in advance if a declaration is involved.
- Check whether every page needs to be certified or just the first, especially for multi page documents like transcripts.
- Confirm opening hours and whether you need an appointment, as some counters are busiest at lunchtime.
- Keep your own scan of the finished, stamped document before you send it anywhere.
If the document is important, for a visa, a property matter, a court case, or anything with a deadline, it is worth paying for professional guidance rather than guessing. A short consultation with a law firm can confirm the exact route your document needs to take, which is money well spent when a rejected document could set you back weeks. This article does not set out any fees, because they vary between providers and over time, so ask for a quote before you commit.
The main thing to remember is simple. Match the service to the destination. For something staying in Singapore, a commissioner for oaths is often the answer. For something crossing a border, expect notarisation and possibly legalisation, and always verify the current requirements with the body that will receive your document.
Explore more
How to Get a Document Notarised
Avoiding Common Scams and Fraud
How to Budget for Life in Singapore