Section III: Taxpayer returns

Articles in this section · 10

Article 170 ter

French General Tax CodeIn force

Updated 8 Nov 2023

I. - A taxpayer subject to the obligation to file an annual tax return under the conditions provided for in 1 of article 170 and who claims the benefit of deductions from overall income, tax reductions or credits, the list of which is set by decree in the Conseil d'Etat, may hand over the supporting documents for the corresponding expenses to a person exercising the mission of trusted third party.

The mission of the trusted third party consists exclusively, on the basis of a contract entered into with the taxpayer, of:

1° receiving the supporting documents filed and presented by the taxpayer in support of each of the deductions from overall income, tax reductions or credits referred to in the first paragraph;

2° drawing up a list of these documents, together with the amounts appearing on them;

3° certifying that these operations have been carried out;

4° ensuring the safekeeping of these documents until the expiry of the administration's recovery period;

5° forwarding them to the administration at its request.

The use of a trusted third party does not exempt the taxpayer from keeping a copy of the supporting documents in order to respond, if necessary, to requests from the administration.

II. - The mission of trusted third party is reserved for persons who are members of the regulated professions of lawyer, notary and chartered accountant.

III. - The procedures for control of the taxpayer by the administration are not modified by this article.

IV. - The ordinal authorities of the professions mentioned in II shall enter into a national agreement with the administration for the implementation of this scheme. This agreement shall apply for as long as it is not terminated by one of the signatory parties.

To carry out the mission mentioned in I, the trusted third party will enter into an individual agreement with the administration for a period of three years. This agreement may be terminated by one of the signatory parties.

In this agreement, the trusted third party undertakes in particular to teletransmit to the tax authorities, in accordance with the provisions of article 1649 quater B ter, the annual income tax returns of its customers who have given their agreement to this effect in the contract referred to in I.

V. - In the event of a breach of the obligations contained in the individual agreement referred to in IV, the administration shall terminate the agreement and withdraw the professional's right to carry out the trusted third party mission. The latter shall inform the clients concerned within three months of the termination of the agreement.

VI. - The conditions for the application of this article are specified by decree in the Conseil d'Etat.

Mariela Petrova

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Common Questions

Working with a corporate lawyer in France — Q&A

Any time a strategic decision changes how the company is owned, governed or contractually bound — incorporation, fundraising, M&A, restructuring, shareholder agreements, or major commercial contracts. Earlier engagement always costs less than later remediation.

A notary (notaire) is a public officer who authenticates specific deeds (mainly real-estate transfers and certain family-law acts). A corporate lawyer (avocat) advises on strategy, negotiates and drafts company documents, and represents you in disputes. The two roles complement rather than overlap.

Yes — most of our clients are foreign suppliers, investors or holding entities. We bridge the gap between French law and your home jurisdiction's expectations and deliver everything bilingually.

The SAS (Société par Actions Simplifiée) is the default choice for most international structures: flexible governance, single shareholder allowed, no minimum capital, and works cleanly with foreign holding entities. We assess SARL, SA, SCI on the merits when the situation calls for it.

Yes — communications with a French avocat are protected by the secret professionnel (Article 66-5 of the Law of 31 December 1971). This protection is broader than the common-law attorney-client privilege and applies to written and oral exchanges.

We work on fixed fees for clearly scoped engagements (incorporation, contract drafting, audits) and on monthly retainers for ongoing advisory. Hourly billing is the exception, not the default. You always know the cost before work starts.

Typical timeline is 2–3 weeks from KYC kick-off to RCS registration, assuming standard documentation. Holding-company structures, foreign-shareholder identification or in-kind contributions can extend this — we flag the gating items at the first meeting.

Absolutely. We routinely coordinate with your in-house counsel, expert-comptable or notaire — pragmatic collaboration is the norm, not the exception. We send them everything they need to do their part without duplicating work.

Mariela Petrova

Mariela Petrova

Avocate au Barreau de Paris

Toque #C2396

15+ Years In Corporate Practice

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Communications protected by professional secrecy — secret professionnel de l'avocat, Article 66-5 of the Law of 31 December 1971.

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