Amending a French Training Agreement: When You Need a Formal Rider to a Signed Contract
A client company asks to push a session back by two weeks. An OPCO ultimately approves a different volume of hours than the one on the original quote. An unavailable trainer forces a mid-course revision of the syllabus. In each case, the training agreement already signed no longer matches what is actually going to happen — raising the question: does this call for a brand-new document, a quick email, or a formal rider (avenant)? Here is what French contract law requires, what funders expect, and how to secure these changes without restarting the whole file.
The rule that governs any contract change
A training agreement (convention de formation), whether it binds the provider to a company, an OPCO, or any other professional buyer under Article L6353-1 of the French Labour Code, is a contract like any other under civil law. Article 1193 of the Civil Code sets a simple, non-negotiable rule: “Contracts may only be modified or revoked by the mutual consent of the parties, or for reasons authorized by law.” In practice, neither the training provider nor its client can unilaterally decide to change a date, a price, or content that has already been agreed. Both parties must consent, and that consent must be provable.
That is exactly the purpose of a rider (avenant): a written document, signed by the same parties as the original agreement, that modifies one or more named clauses while leaving the rest of the contract untouched. A rider does not replace the original agreement — it is attached to it, and the two documents are filed and read together.
Which situations call for a rider
Not every change carries the same weight. Some are simple logistical adjustments; others go to the heart of what the funder agreed to pay for.
| Change | Rider needed | Watch out for |
|---|---|---|
| Rescheduling session dates | Generally not, if price and syllabus are unchanged — a short written agreement is enough | Put it in writing anyway, for traceability |
| Change in the agreed price | Yes, always | The funder must approve it before invoicing |
| Substantial change to the syllabus or objectives | Yes | A syllabus that changes in nature can reclassify the action itself |
| Change of location or format (in-person to remote) | Yes, if it alters the arrangements stated in the agreement | Possible impact on funding eligibility |
| Replacing a named trainer | Depends — either a rider or a simple written notice | See our article on replacing a trainer mid-course |
The most useful rule of thumb: if the change affects a mandatory clause of the agreement — price, duration, content, delivery arrangements — a written, signed rider is required. A purely logistical shift with no impact on substance can be handled more lightly, as long as there is a written record that both parties agreed.
What a rider should contain
An effective rider does not need to be long, but it needs to be precise:
- An exact reference to the original agreement: signing date, parties involved, and the agreement’s reference number if you assign one.
- The clause or clauses being changed, quoted as they originally read, followed by the text that replaces them.
- The effective date of the change, which can be immediate or deferred.
- An explicit statement that the rest of the agreement remains unchanged — a standard sentence is enough: “All other clauses of the agreement dated [date] remain unchanged and continue to apply.”
- The signature of the same authorized signatories as on the original agreement, with the date.
If the change affects the syllabus or the price, always attach the updated version of the relevant document (detailed programme, revised quote) as an appendix to the rider: this trio — rider, syllabus, quote — is exactly what a funder or an auditor asks for first when checking a file.
The specific case of OPCO funding
When training is funded by an OPCO, modifying an agreement is not just a matter between the provider and the client company: the funder must also be informed, particularly when the price or the volume of hours changes. An OPCO that approved funding based on an initial quote can refuse any unreported addition, or cap its funding at the amount originally granted — see our guide on OPCO funding refusals to avoid this kind of block. Best practice is to send the rider to the OPCO as soon as it is signed, before delivering the modified part of the service, rather than seeking to regularize the situation after the fact.
The CPF/EDOF case: no classic rider
For a file funded through the Compte Personnel de Formation, the logic is different: there is no “professional buyer” agreement under Article L6353-1, but a contract automatically generated by the EDOF platform between the provider and the account holder. A date change is handled directly in the professional EDOF portal, under the platform’s own deadlines — beyond seven working days before the start date, the change must go through EDOF support rather than a direct edit, as detailed in our article on a provider cancelling a session. Price, meanwhile, is set when the offer is created and cannot be changed retroactively file by file: any pricing change goes through a catalogue update, not an individual rider.
What a Qualiopi auditor looks at
An agreement changed without a written trace creates a gap between what the file shows and what actually happened — exactly the kind of inconsistency an auditor looks for. Indicator 1 on public information and Indicator 5 on operational, assessable objectives both assume ongoing consistency between what is announced, what is signed, and what is delivered; Indicator 9 on delivery conditions checks that the provider can justify any gap from what was planned. A rider filed alongside the original agreement directly answers that requirement; a file where the actual date, the invoiced price, or the content delivered matches no signed document at all is, conversely, a common non-conformity found during audits.
Why putting it in writing beats a verbal understanding
The temptation to handle a change “informally,” with a quick call or a tacit understanding, is real — especially for a change that seems minor at the time. A now-classic study in the sociology of law, Stewart Macaulay’s “Non-Contractual Relations in Business: A Preliminary Study,” published in 1963 in the American Sociological Review, shows that businesses often prefer to adjust their agreements informally rather than systematically resorting to written amendments — a choice that works well as long as the relationship stays smooth, but leaves both parties exposed the moment a disagreement arises over what was actually agreed (see the study).
Oliver Hart and John Moore’s work on incomplete contracts, “Incomplete Contracts and Renegotiation,” published in 1988 in Econometrica, adds a complementary insight: when a contract cannot anticipate everything in advance — the norm for a training service that unfolds over several weeks — the quality of the renegotiation mechanism the parties have set up becomes a decisive factor for the long-term solidity of the contractual relationship (see the study). A ready-to-use rider template is, quite concretely, that renegotiation mechanism formalized in advance rather than improvised under pressure.
Checklist before amending an agreement
- Does the change affect a mandatory clause (price, duration, syllabus, delivery arrangements)? If so, a written, signed rider is required.
- Have both signatories of the original agreement given written consent before any billing change?
- Has the funder (OPCO, company) been informed and approved the change before the affected part of the service is delivered?
- For a CPF file, was the change recorded within EDOF’s own deadlines?
- Does the rider explicitly reference the original agreement and state that everything else remains unchanged?
- Are the updated syllabus and quote filed together with the rider, ready to be shown at audit?
Take action
A clear, ready-to-customize rider template keeps you from improvising a legal document under pressure when a client requests a last-minute change. The Kit Certif Complet (€297, 14-day guarantee) includes agreement and rider templates compliant with Article D6353-1, alongside all the evidence expected by Qualiopi’s indicators. If you are still building your first contractual documents, the ebook “Create Your Training Organization in 30 Days” (€67) lays the right foundations from the start, and the Complete Pack (€347) brings both resources together.
Frequently asked questions
+Is a simple email exchange enough to modify a training agreement?
Legally, a written agreement by email between the two signatories can amount to the mutual consent required under Article 1193 of the French Civil Code. But an email buried in an inbox is a weak, hard-to-read piece of evidence for a funder or a Qualiopi auditor. A formal, dated rider signed by both parties remains far preferable as soon as the change affects dates, price, or content.
+Do you need a rider to reschedule a session by a few days?
It depends on the funder. For training paid by a company or an OPCO, a short reschedule is generally a minor change that a brief written agreement can cover, provided the price and syllabus stay the same. For a CPF file on EDOF, date changes are handled directly on the platform, within its own deadlines, with no paper rider involved.
+What does a training provider risk by changing a service without a rider?
Three compounding risks: a dispute with the client over what was actually agreed, with no written record to settle it; a funding refusal or reduction if the funder finds a gap between the original agreement and the service actually delivered; and a Qualiopi non-conformity if the file cannot trace the change and its justification.
+Does a rider replace the original training agreement?
No. A rider is added to the original agreement: it only modifies the clauses it expressly names and leaves everything else unchanged. Both documents are filed together, with the rider referencing the agreement it amends by its date and, if you assign one, its reference number.