Monegasque citizenship by naturalisation

Ten adult years of habitual residence

Article 5 allows an application after ten years of habitual residence in Monaco accumulated after reaching eighteen. Childhood residence is not substituted for those adult years. Article 6 separately allows the Prince to naturalise someone without the residence-period condition; that exceptional discretion is not the ordinary eligibility rule.

Sovereign grant and investigation

Naturalisation is granted by Sovereign Ordinance after investigation of the applicant's character and circumstances. Article 5 also requires justification that naturalisation would cause loss of the previous nationality and permanently release the applicant from foreign military-service obligations. Residence alone does not establish an entitlement or a processing deadline.

Release after grant has a strict condition

Where the previous national law does not allow nationality loss before another nationality is acquired, naturalisation can still occur. The applicant must then prove loss of the previous nationality within six months of publication of the grant. Otherwise the applicant, and children deriving nationality through that applicant, are deemed never to have been Monegasque.

Later foreign nationality can cause loss

Article 8 provides for loss of Monegasque nationality when a person naturalises abroad or acquires a foreign nationality on their own application. It also addresses unauthorised voluntary service in a foreign army. These rules differ from the separate marriage-declaration route and do not justify a blanket claim about every dual-nationality situation.