A label “Diot-Siaci” or “Siaci Saint Honoré” appears on the statement of a professional account, without any recent subscription to explain it. The name displayed by the bank does not always correspond to an insurer, but sometimes to a broker or a manager acting on behalf of a third party. Understanding the mechanics behind this debit requires tracing back the contractual chain, from the SEPA mandate to the collective contract negotiated by the employer or the professional branch.
Identifying the Diot Siaci debit with the SEPA mandate
The commercial name displayed on a bank statement only partially informs about the origin of a debit. For a Diot-Siaci debit, two elements of the SEPA mandate allow for reliable identification: the ICS (SEPA creditor identifier) and the unique mandate reference.
The ICS is a code assigned to each creditor authorized to issue debits. The unique mandate reference links the debit to a specific contract or file. These two pieces of information are included in the mandate signed when the debit is set up and can be requested from the bank or the company’s accounting department.
When trying to understand the Diot Siaci debit on a professional account, the confusion often arises from the fact that Diot-Siaci may appear as a creditor even though it is not the final insurer. The group frequently acts as a broker-manager on behalf of third-party insurance organizations.
Broker, manager, or insurer: why the bank label is confusing
Diot-Siaci is not an insurance company. It is a brokerage and consulting group that designs, negotiates, and manages insurance programs for businesses. The distinction is technical, but it changes the interpretation of a bank statement.
Three distinct roles can generate a debit under this name:
- Broker: Diot-Siaci negotiated the contract with an insurer on behalf of the company, and the debit passes through its services before being transferred.
- Delegated manager: the insurer (for example, Klesia or Malakoff Humanis in certain branch schemes) entrusts the administrative management of the contract to Diot-Siaci, which then issues the contribution calls in its own name.
- Intermediary in a mandatory collective contract: some collective agreements designate a recommended organization, and Diot-Siaci can ensure the operational management of the health or welfare scheme linked to this branch.
The bank label is not sufficient to distinguish these three cases. Only the reconciliation with the SEPA mandate and the company contract allows determining whether the debit corresponds to a collective mutual, a mandatory welfare scheme, or a professional risk guarantee.
Diot Siaci debit on a professional account: collective contract or direct subscription
On a professional account, the Diot-Siaci debit most often results from a collective contract subscribed by the employer for the benefit of its employees. Since the generalization of mandatory complementary health insurance in companies, employer and employee contributions pass through the manager designated in the contract. When this manager is Diot-Siaci, its name appears on the company’s account statement.
Field feedback varies on this point: some TPE leaders discover the debit without recalling having signed a specific mandate, because the setup was managed by their accountant or by the professional branch itself.
Check the consistency of the debited amount
A quick check involves comparing the debited amount with the schedule outlined in the collective contract or the membership certificate. Any discrepancy between the debited amount and the contractual schedule should be reported to the manager within a reasonable time frame, as adjustments to contributions during the year (entry or exit of employees, change of plan) can modify the amount without clear prior notification.
If no collective contract is in force in the company and a Diot-Siaci debit appears nonetheless, the avenue to explore is that of an old contract not terminated or a SEPA mandate that remained active after a change of provider.
ORIAS register and verification of the insurance intermediary
An additional step involves searching for Diot-Siaci in the ORIAS register, which lists all insurance intermediaries authorized to operate in France. Registration with ORIAS confirms the regulatory status of the intermediary and allows verification of its category (broker, agent, representative).
This verification is useful in two specific cases. The first: a debit whose origin remains unclear after consulting the SEPA mandate and the company contract. The second: doubt about the legitimacy of the debit, for example, after a change of broker where the former manager continues to issue debits.
The information available in the register
The ORIAS register provides the registration number, the category of intermediation, the company name, and the address of the headquarters. However, it does not provide any information about the contracts managed or the amounts. The register validates the status, not the details of the debit.
Disputing or stopping a Diot Siaci debit: deadlines to know
The SEPA framework provides for two types of disputes. For an authorized debit (signed mandate), the account holder has eight weeks from the debit date to request a refund from their bank, without having to justify their request. For an unauthorized debit (no valid mandate), the deadline extends to thirteen months.
On a professional account, the procedure generally goes through the banking service dedicated to businesses. Revoking the SEPA mandate with the bank prevents any future debit, but does not terminate the underlying insurance contract. Termination must be addressed separately to the insurer or the broker, depending on the conditions of the collective contract.
A Diot-Siaci debit on a professional account is therefore neither suspicious nor abnormal in most cases. It reflects the ordinary functioning of delegated management in collective insurance. Tracing back to the SEPA mandate and cross-referencing with the company contract remains the only reliable way to clarify the ambiguity.
