You have chosen the villa, the date and the guest list. Then a local registrar overseas asks for a document you have never heard of: a certificate of no impediment.
It sounds like bureaucratic red tape, and in some ways it is. It can also cause last-minute delays for couples marrying abroad. This guide explains what the certificate is, who issues it, how to apply, and what to check so the paperwork never stands between you and your ceremony.
This article is general information, not legal advice. Rules differ by country and change over time, so always confirm requirements with the authorities where you will marry.
A certificate of no impediment (often shortened to CNI) is an official document confirming that no legal obstacle prevents you from marrying. In practice, it tells a foreign authority that you are free to marry: you are not already married or in a civil partnership, and nothing else in your home country’s law blocks the union.
You may also see similar documents called:
Certificate of freedom to marry
Single status certificate or affidavit
Certificate of legal capacity to marry
Nulla osta (Italy) or certificado de capacidad matrimonial (Spain)
The names differ, but the purpose is the same. The authority conducting your wedding wants proof from your home jurisdiction before it will legally marry you.
A country that marries foreign nationals needs to be sure they are legally free to marry. If one partner is secretly still married elsewhere, the marriage can be void. Asking for a certificate from your home authority shifts that verification to the people best placed to check your records.
This is also why the certificate only matters for legal weddings abroad. If you are planning a symbolic ceremony, or completing the legal marriage at home and celebrating overseas, you may not need one at all. Some couples choose that route to simplify the paperwork, and it is worth discussing early with your celebrant or planner. Our destination wedding guide walks through how to weigh the two approaches.
There is no single global issuer. The certificate comes from the civil registration authority in your home country, typically the one covering the area where you live. What that looks like depends on where you live.
In England and Wales, a CNI can only be provided for British citizens, and it is obtained from the Register Office in the district where you live, using the same process as giving notice to marry in the UK.
Some points UK couples should know:
Residency rules apply. You generally need to have lived in a registration district in England or Wales for at least seven clear days when giving notice.
Notice is required. A statutory notice fee is payable, and some councils don’t charge separately for the certificate itself. Fees differ between councils, so check with your local office.
Timing is built in. After a 28-day waiting period, the certificate can be issued if no objection has been raised.
Alternatives exist. Where a certificate cannot be issued for a particular country, overseas authorities may accept a sworn affidavit or a “no trace” letter from the General Register Office.
Scotland and Northern Ireland run their own registration systems, so contact your local registrar if you live there.
The US has no federal equivalent. Couples typically provide an affidavit of eligibility to marry (also called a single status affidavit), sworn before a notary. Some countries then require an apostille from your state’s Secretary of State, and some states require a county clerk to certify the notary first. Ask the foreign authority which version it accepts.
Australia and other countries
In Australia, a certificate of no impediment to marriage is issued by your state or territory registry of births, deaths and marriages. Registries can also provide a Single Status certificate or a No Record Result certificate. The Australian Government’s Smartraveller guidance explains how to apply.
Other countries follow their own models. Some issue a formal certificate, some a sworn declaration, and some a civil status extract from the population register.
The most reliable approach is to start with the destination country’s requirements. The embassy, consulate or local registrar will tell you which document they want, and your home authority will tell you whether it can provide it.
Details vary, but these are typical:
Your full legal name, date of birth and nationality
Your current address
Your marital status (single, divorced or widowed)
Your partner’s name, where the process names them
A statement that no legal impediment is known
The issuing authority’s signature, seal or stamp, and the date of issue
If you are divorced or widowed, expect to supply supporting paperwork such as a divorce certificate or a death certificate. In the UK, foreign divorces may need General Register Office clearance before you can remarry, so raise that early.
Confirm exactly what your destination requires
Do not rely on a blog post, a venue brochure or another couple’s experience, ours included. Rules can differ even within the same country. Contact the local registrar or the country’s embassy and ask:
Do you require a certificate of no impediment, or will another document do?
How long is it valid, and how recent must it be on the wedding day?
Does it need an apostille or legalisation?
Does it need an official translation?
Gather your identity and status documents
Typical requests include a passport or other photo ID, proof of address, and a birth certificate. If you have been married before, bring the paperwork ending that marriage. Names must match across documents, so if you have changed your name, bring evidence of the change.
Apply through your home registry
In the UK, you book an appointment at your local register office and give notice. You can only give notice when you are planning to marry a specific person in a specific country in the near future, so have your destination and rough timeline ready. In Australia, you apply to your state or territory registry using its CNI application form.
Wait for the certificate to be issued
In the UK, build in the full 28-day waiting period, plus extra time for postage or collection. Check the certificate carefully before you leave the office, because some register offices cannot correct errors once you have left the building.
Legalise and translate it if required
Some countries want an extra layer of authentication, covered next.
An apostille is a certificate attached to a public document confirming that the signature or seal on it is genuine. It is used between countries that belong to the Hague Apostille Convention. For other countries, the document may need full legalisation instead. Some destinations will not accept a certificate of no impediment without an apostille or legalisation stamp.
In the UK, the GOV.UK legalisation service handles this. In Australia, the Department of Foreign Affairs and Trade handles it; the Smartraveller guidance linked above explains the process.
Two practical points to watch:
Translation. UK certificates are issued in English. If the destination requires another language, you may need a sworn or certified translation.
Expiry. Authorities in some countries refuse a certificate dated more than three months before the ceremony. Applying too early can also cause problems.
In the UK, the waiting period alone is 28 days, so allow at least two months from your first appointment to holding all the documents. That allows for collection or postage, apostille processing and translation. Add more time if you are divorced or have changed your name, or if you are marrying in peak season, when consulates and registrars may be busier. Treat this as a general guide and confirm timings with your local office.
Book your venue and date first, but build the paperwork timeline into your plan from the start. Most popular wedding locations book well ahead, and our Italy, Greece and France destination pages are a good place to start.
Assuming the certificate alone is enough. A certificate on its own may not be enough for the marriage to go ahead, so ask the destination authority for the complete list of documents.
Applying in the wrong place. Your certificate must come from the authority covering where you live. Applying elsewhere costs time and money.
Mismatched names. A passport, birth certificate and certificate that spell your name differently can cause rejections overseas. Fix discrepancies before you apply.
Missing the validity window. Check how long your certificate remains acceptable and work backwards from the ceremony date.
Doing paperwork you don’t need. If you marry legally at home and celebrate abroad, the overseas ceremony usually needs no certificate.
Not always. You may not need one if:
You are holding a symbolic or blessing ceremony abroad and marrying legally at home
The destination accepts a different document, such as a sworn statement or a single status certificate
Popular destinations like Bali and Mexico each have their own requirements for foreign couples, and these can change. Always verify directly with the local authority or an experienced on-the-ground planner.
Legal paperwork is the least glamorous part of planning a wedding abroad, and mistakes are hardest to fix once you are overseas. Our team coordinates legal requirements with celebrants and lawyers in our network on the ground, and your Wedded Advisor can walk you through whether a legal ceremony abroad or a legal marriage at home plus an overseas celebration suits you better. You can speak with a Wedded Advisor to talk it through.
To keep your guest list, budget and wedding website in one place, Wonderland Studio is free for every couple. If you are still choosing where to marry, browse our destination wedding locations and shortlist places before you check their legal requirements.
Written by
SEO Specialist
Ayrton Christian Braga is an SEO Specialist at Wedded Wonderland, where he writes optimized articles and web pages that center on destination weddings, cultural wedding traditions, and guides for everything in between.
Search real weddings, venues and vendors from around the world.
Search Wedded Wonderland
