International federation
International Naturist Federation
The International Naturist Federation (INF-FNI) is the worldwide umbrella body for national naturist federations. It defines naturism as a way of life in harmony with nature, expressed through social nudity and respect for oneself, others and the environment, and it issues the INF card that many naturist campsites and resorts ask for.
What does the INF-FNI do?
The federation brings together national federations such as the FFN in France, the DFK in Germany, British Naturism and the AANR in the United States. It holds a world congress, runs international youth and sports meetings, and keeps the definition of naturism that most federations use.
For travellers its most visible product is the INF card (sometimes called the INF stamp or passport). It is issued through the national federations and shows that the holder is a member of an organised naturist body.
Do I need an INF card to visit a naturist resort?
Usually not. Most nude beaches are public and free. Many naturist campgrounds and resorts in France, Croatia and Germany accept anyone who follows their rules, though some ask for an INF card or a federation licence and others sell a day licence at reception.
If you plan a longer naturist holiday in Europe, joining your national federation is often cheaper than paying for licences at each site.
Frequently asked questions
What does INF-FNI stand for?
INF is the English abbreviation (International Naturist Federation) and FNI the French one (Fédération naturiste internationale). Both name the same organisation.
How is naturism defined?
The INF-FNI definition, adopted in 1974, describes naturism as a way of life in harmony with nature, characterised by the practice of communal nudity, with the intention of encouraging self-respect, respect for others and for the environment.
Which countries are members?
Member federations exist across Europe, North and South America, Oceania and parts of Africa and Asia. The federation's own website lists the current members.
Other organisations
Facts from the organisation's own website and Wikipedia. Last reviewed 31 October 2026. Corrections: see the editorial policy.