
The business card remains a reflex for prospecting among freelancers and leaders of small structures. The SIRET number is often included, sometimes not. The question of its mandatory nature arises regularly, and no legal text answers it categorically. The legal framework is built by extension, based on provisions that target other professional supports.
Business card and professional documents: a blurry legal boundary
The commercial code precisely regulates the mentions to be included on invoices, quotes, order forms, and commercial correspondence. The business card, however, does not appear in any dedicated article. This absence creates a gray area that professionals interpret in very different ways.
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However, the DGCCRF has reminded that prospecting supports can be controlled just like websites or posters. If a business card suggests an established company without sufficiently specifying the identity of the professional (name, legal form, SIREN or SIRET number), the administration may consider it a failure to comply with the obligation of pre-contractual information. The legal basis then relies on the rules concerning misleading commercial practices, not on a specific text regarding business cards.
A comprehensive guide on the mandatory mentions of the SIRET number on business cards details the concrete implications for each status. The distinction between communication support and advertising support plays a role in assessing the risk: a promotional flyer is subject to stricter obligations than a card handed over in person during a meeting.
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EI mention on business cards: what the 2022 law requires
Since 2022, the unique status of individual entrepreneur imposes new documentary obligations. Among them, one directly concerns professional supports: the mention “EI” or “Entrepreneur individuel” must appear next to the name on all documents used for the exercise of the activity.
The official doctrine does not explicitly mention business cards in the list of concerned supports. The texts target invoices, quotes, advertising documents, and correspondence. However, Bpifrance Création and several support networks recommend applying this mention to all commercial supports, including business cards, to avoid any ambiguity regarding the professional’s patrimonial responsibility.
Why this recommendation goes beyond mere formalism
The unique status of individual entrepreneur has introduced a full legal separation between personal and professional assets. The EI mention signals this separation to third parties. On a business card handed to a supplier or partner, the absence of this mention can create confusion about the applicable liability regime in case of a dispute.
The risk is not theoretical. A craftsman distributing cards without the EI mention and without a SIRET number gives the impression of operating informally, which can complicate the business relationship or trigger a report to the DGCCRF.
SIRET on business cards: legal obligation or good practice
No article of the commercial code explicitly requires the SIRET number to be included on a business card. The texts that make the SIRET mandatory target invoices (article L441-9 of the commercial code), quotes, general terms of sale, and professional websites.
The business card is downstream from these documents. It serves to establish initial contact, not to formalize a transaction. This distinction explains why the legislator did not deem it necessary to subject it to the same regime.
What controls reveal in practice
The DGCCRF can control any support that identifies a professional to the public. In practice, controls rarely focus solely on the business card. They occur when a set of indicators suggests misleading practices: absence of registration, canvassing without clear identification, incomplete website. The business card then becomes a piece of the file, not the trigger for the control.
For micro-entrepreneurs and craftsmen, including the SIRET on the business card is therefore more of a good practice than a legal constraint. Field feedback varies on this point: some consular networks present it as mandatory, others as recommended.

Information to include on a professional business card
In the absence of a specific legal list, the mentions to prioritize are derived from the general framework applicable to professional documents and recommendations from support organizations. Here are the elements that reduce legal risk while enhancing the credibility of the support:
- Name and surname of the professional, followed by the mention “EI” or “Entrepreneur individuel” for individual entrepreneurs subject to this obligation since 2022
- Company name or trade name, accompanied by the legal form (SARL, SAS, EURL) for companies
- SIREN or SIRET number, which allows any interlocutor to verify the legal existence of the company
- Contact details: professional address, phone number, email address
- Activity carried out, formulated in a sufficiently precise manner to avoid any confusion
For professionals engaged in a regulated activity (real estate agents, accountants, health professions), additional mentions may apply: professional card number, affiliated organization, professional civil liability insurance.
What the business card does not replace
Even if complete, a business card does not exempt from complying with the obligations specific to invoices, quotes, and legal mentions on the website. The SIRET remains mandatory on invoices and the website, regardless of the information present on the card. These supports are subject to distinct regimes.
The common pitfall is to consider that a well-informed card covers all identification obligations. This is not the case. Each professional document responds to its own requirements, and the business card has no legal equivalence with an invoice or general terms of sale.
Caution remains advisable for any entrepreneur distributing cards at trade shows, meetings, or canvassing. Adding the SIRET takes little space and removes any ambiguity about the seriousness of the business approach. The cost of an oversight far exceeds that of an additional line on the support.