This brochure has four sections:

> The first section defines marriage and legal cohabitation as well as the differences between the two procedures for establishing a legal bond between the couple.

> The second section scrutinizes the prohibition of unions of convenience and provides a definition and analysis of a possible unions of convenience.

> The third section presents different procedures for marriage or legal cohabitation and details the rights and duties of partners and public services concerned.

> The fourth section, lastly, analyses the penalties incurred by a union of convenience from the point of view of criminal law, civil law, and residence.