The Notice of Intended Marriage — everyone just calls it the NOIM — is the single most important piece of paper in your wedding. Get it lodged in time and everything else is easy. Miss the deadline and you legally cannot marry on your date. Here's exactly what it is, the famous "one-month rule," how long it stays valid, who can witness it, and the documents you'll need — in plain English.
What is the Notice of Intended Marriage?
The NOIM is the official form that tells the law you intend to marry. It's a Commonwealth form under the Marriage Act 1961, so the rules are the same whether you marry in Sydney, Melbourne or a beach in Queensland. You complete it, sign it in front of an authorised witness, and give it to your authorised marriage celebrant — the celebrant holds it, not a court or a registry.
Lodging the NOIM is what starts the clock on your marriage. Until it's validly in your celebrant's hands, no wedding date is legally locked in — which is why it's the very first thing I sort out with every couple.
The one-month rule — and the 18-month limit
This is the part that catches people out, so here it is clearly:
- Your celebrant must receive your completed NOIM at least 1 month before the wedding.
- It can't be lodged more than 18 months before the wedding.
So the window to lodge is 1 to 18 months out. The one month is a genuine legal minimum, not a guideline — it's the notice period the law requires between telling your celebrant and saying "I do." Couples planning a fast legals-only wedding or the Australian version of a court marriage are the ones who most often bump into it, because they want to marry quickly.
What if there's less than a month?
All is not lost. In limited circumstances a "prescribed authority" can approve a shorter notice period — for reasons such as employment or travel commitments, a medical situation, or other genuine grounds. It isn't automatic and it isn't for "we left it late," but it exists. If your date is under a month away, talk to me straight away — the sooner we look at it, the more options you have.
Who can witness you signing the NOIM
You don't sign the NOIM alone — your signatures must be witnessed by an authorised person. That includes:
- An authorised marriage celebrant (so I can witness it for you), or
- A Justice of the Peace (JP), or
- A barrister or solicitor, or
- A medical practitioner (doctor).
If you're overseas when you sign, other officials can witness it there (for example an Australian consular officer or a notary public). And the law now permanently allows the NOIM to be witnessed in person or remotely over an audio-visual link — handy when a couple is in different cities. If you're both in Australia, the person witnessing remotely must also be in Australia.
What you'll need to complete it
To fill in the NOIM properly you'll want a few details and documents ready:
- Full names, dates and places of birth, current addresses, and your parents' details.
- Proof of date and place of birth — either an official birth certificate or a current passport (from any country). You only need one of the two.
- If either of you has been married before, evidence of how it ended — a divorce order or the death certificate of the former spouse. Your celebrant must sight this before the wedding.
There's no citizenship or residency requirement to marry in Australia — citizens, permanent residents and people on student, work, partner or visitor visas can all marry here. If any of your documents aren't in English, you'll need a NAATI-certified translation; I've written a companion guide on overseas documents and translations that covers this in detail.
Prefer to fill it in without the headache?
I built a free NOIM helper that walks you through the form field by field and fills the official PDF for you — no printing, no guessing which box is which. You review it, then we sign it together.
Who can legally marry
The NOIM assumes you both meet Australia's basic requirements to marry. The key ones:
- You must generally be 18 or over. It is unlawful for anyone under 16 to marry, and for two people who are both under 18 to marry each other. A 16 or 17-year-old can only marry someone over 18, and only with a court order.
- You must not be already married to someone else.
- You must not be marrying a direct ancestor, descendant, or a sibling (including half-sibling).
- You must both be marrying freely and with full consent.
After the NOIM — what happens next
Lodging the NOIM is step one, not the whole process. The rough shape of it:
- Lodge the NOIM with your celebrant (1–18 months before).
- Wait out the minimum one-month notice period.
- Just before the ceremony, sign the Declaration of No Legal Impediment to Marriage — a short form confirming you're free to marry.
- Have the ceremony, with your celebrant and two witnesses aged 18 or over.
- Your celebrant registers the marriage with the state registry, and you can then order your official marriage certificate.
If you'd like the full walk-through, see how to get married in NSW for every step, and the Australian marriage certificate for what happens after the wedding.
The couples who relax on their wedding day are the ones who got the paperwork out of the way early. Lodge the NOIM, and the rest is just the lovely part.
Frequently asked questions
How far in advance do we have to lodge the NOIM?
At least one month before the wedding, and no more than 18 months before. Your celebrant must have the completed, signed NOIM in hand for that whole minimum month.
Can we get married in less than a month?
Sometimes. A prescribed authority can approve a shorter notice period in limited situations — such as travel, work, or medical reasons. It isn't automatic. Speak to your celebrant as early as possible if your date is under a month away.
How long is a NOIM valid?
A NOIM is valid for 18 months from the date it's signed. If you don't marry within that time, you have to complete a new one.
Do we both need to sign it at the same time?
No. You can sign at different times and even in front of different authorised witnesses. It can also be witnessed in person or remotely over video. If you're both in Australia, anyone witnessing remotely must also be in Australia.
Can we lodge a NOIM from overseas?
Yes. You can complete the NOIM while overseas if you're planning to marry in Australia, and have it witnessed by an appropriate official there. Send it to your celebrant so the one-month clock can start.
What documents do we need to lodge it?
Proof of date and place of birth — a birth certificate or a current passport — and, if either of you was married before, a divorce order or the former spouse's death certificate. Documents not in English need a NAATI-certified translation.
Legal information on this page is current as at 14 September 2026 and has been checked against guidance from the Attorney-General's Department and the NSW Registry of Births, Deaths & Marriages. Laws and requirements change — confirm current requirements before you rely on them. This is general information to help you plan, not legal advice.
Ready to lodge your NOIM?
Tell me your date and I'll make sure the timing works, walk you through the form, and witness it for you. If your date is close, message me today — the one-month clock matters.
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