Citizenship by Marriage

Citizenship by marriage is the acquisition of a country's citizenship by registration or naturalisation as the lawful spouse of one of its nationals.

It is a long-established route recognised in the nationality laws of many states. A foreign spouse who meets the statutory conditions, typically a qualifying period of marriage and, in some countries, a period of lawful residence, may apply to become a citizen and receive that country's passport. Mirabello Consultancy advises couples on this pathway in three jurisdictions: Grenada, St Kitts and Nevis, and Antigua and Barbuda.

Eligibility generally requires a genuine, subsisting marriage to a citizen and completion of the qualifying period fixed by that country's law.

Requirements vary by jurisdiction, but most share common features: a legally valid marriage, a minimum period of marriage or cohabitation, good character, and in several countries a residence requirement. Some states also require the couple to still be living together at the point of application, and many ask that the citizen spouse consent to and support the application. Because the exact conditions differ, each country page sets out the specific rules. precise qualifying periods and residence conditions per country. Applicants should confirm current requirements with official government sources before relying on any figure. In our experience, the two questions that decide most cases are whether the statutory qualifying period has genuinely been completed and whether the couple can evidence a real, shared life, so we address both at the outset rather than late in the process.

Citizenship by marriage differs fundamentally from citizenship by investment, because it is based on a personal family relationship rather than an economic contribution.

Under a citizenship by investment programme, an applicant qualifies by making a defined financial contribution, such as a government fund donation or approved real estate purchase, and the family relationship is not the basis of the grant. The marriage route involves no investment threshold. Instead it rests on a bona fide marriage and the passage of the statutory qualifying period, so its timeline is driven by the marriage itself rather than by how quickly a contribution can be made. Each approach has different eligibility, evidence, and processing implications, and the right choice depends on your family circumstances and objectives. If you are exploring both family and investment pathways, our citizenship by investment programmes hub compares the economic options side by side.

Applications are documentation-intensive and must demonstrate both legal eligibility and the genuine nature of the marriage.

Governments assess marriage applications carefully to protect the integrity of their citizenship, and they may interview the couple or request further proof. In general terms, applicants should expect to provide a marriage certificate, both spouses' passports and birth certificates, the citizen spouse's proof of nationality, police clearance certificates, and evidence that the marriage is real and ongoing. That evidence can include shared financial arrangements, joint accommodation, correspondence, and photographs over time. Documents issued abroad often need to be legalised or apostilled and, where they are not in the receiving country's official language, professionally translated. Missing or inconsistent documents are a frequent cause of delay, so careful preparation matters.

• Proof of the marriage: an official marriage certificate and, where relevant, evidence the marriage remains subsisting.
• Identity and status: passports, birth certificates, and the citizen spouse's proof of citizenship.
• Good character: police clearance certificates from relevant jurisdictions.
• Genuine-relationship evidence: cohabitation records, joint finances, and a documented shared life.

Mirabello Consultancy guides eligible couples through the marriage route with Swiss precision and complete discretion.

Our specialists assess whether the marriage pathway is available to you in a given country, prepare and verify the full document set, and manage the submission with the relevant authority. Where a couple does not yet meet the qualifying period, or where an investment route is a better fit, we say so honestly and set out the realistic alternatives. As an IMC member and ACAMS-certified firm working across seven languages, we hold every file to the same compliance standard. To review your situation, arrange a free consultation. For the authoritative legal position in any jurisdiction, always consult the relevant government nationality authority, as national laws set and change these rules. better authority source official government guidance.