Following the formal adoption of new promotion regulations on Thursday, influencers in France now risk going to jail if they are found to have violated the rules.
Consumers are intended to be protected from deceptive or fraudulent online business practices by the strict new laws.
They impose restrictions on the marketing of wagering and lottery games and outlaw the promotion of goods like tobacco.
The position is now formally defined for the first time in Europe.
Following passage through the rest of parliament, the bipartisan legislation was approved by the Senate with a unanimous vote on Wednesday.
Influencers are online personalities with a lot of subscribers who have the power to start trends. Some people exhort people to purchase the goods they are hawking without disclosing that they are getting paid to promote them.
The French government claimed that in response to a rise in online scams, they sought to "clarify the contours" of commercial activity and define the "responsibilities and obligations" of influencers.
According to their new laws, "actors of commercial influence" won't be able to promote lotteries or other gambling activities on media that can't bar minors from participating.
Along with tobacco, it will also be illegal to promote certain financial products, medical devices, and cosmetic surgery.
Violations could result in a fine of up to €300,000 (£257,000; $322,000) or a sentence of up to two years in prison.
However, there are doubts about the ability of the authorities to enforce the new laws, particularly when influencers' accounts are visible in France but they are not actually located there.
The Ministry of the Economy, Finance, Industrial and Digital Sovereignty estimates that there are more than 150,000 influencers in France.
