
The La Banque Postale financial center in La Source, located at 1 rue Édouard Branly in La Source Cedex 9 (45900), handles much more than the routine operations of clients in Loiret. In recent years, this site has concentrated the management of contracts that were initially linked to other financial centers in France. This gradual centralization is changing the correspondence habits of many clients, including those who thought they were dependent on Lyon, Bordeaux, or Strasbourg.
Centralization of contracts to La Source: what has changed for clients
La Banque Postale has initiated a movement of gradual centralization of client contracts to the La Source financial center. Accounts historically managed by the centers in Strasbourg, Lyon, or Bordeaux have been transferred to this Orléans address, often without the account holders being clearly informed.
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This transfer does not change the banking services available (transfers, account management, savings), but it does change the address to be used for any postal correspondence. Sending a complaint or document to the wrong financial center can delay processing by several weeks. To find the address of the La Banque Postale La Source financial center, one must check the most recent account statement or log in to the online client space.
The assignment of an account to La Source does not depend on the client’s place of residence. A Parisian or a Lyonnais can very well have their transactions processed at La Source Cedex 9. The distribution logic is based on internal bank criteria related to the account’s history and the type of product subscribed.
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Bank complaints: La Source as a mandatory entry point
The La Source financial center plays a specific role in the complaints process. For disputes regarding banking operations (checks, transfers, direct debits), the address La Banque Postale Centre Financier 45900 La Source Cedex 9 is a mandatory entry point.
Sending a complaint letter directly to the local post office or another financial center does not trigger the regulatory procedure. The letter must reach the financial center managing the account. If this center is La Source, any correspondence sent elsewhere will be redirected, with an additional delay.
Cases that require a letter to La Source
- Dispute of an unauthorized direct debit or incorrect transfer: the managing financial center processes the request and has a regulatory timeframe to respond
- Change of postal address, request for power of attorney, or declaration of inheritance: these formalities require a registered letter to the financial center, not at the counter
- Request for account closure or transfer of bank domiciliation: the procedure goes through the financial center managing the CCP
The CCP account number appears on each statement. It is what identifies the associated financial center. If the postal code is 45900, the letter must be sent to La Source.
Contacting the La Source financial center by phone: pricing and access
The 3639 remains the main number to reach La Banque Postale’s customer service, including for inquiries related to the La Source financial center. As of June 1, 2024, calls to 3639 will be charged as a call to a regular landline, without surcharge.
This pricing change ends a situation that penalized clients calling from a limited mobile plan. The cost now depends solely on the client’s telephone operator, and most plans include calls to landlines in their package.
However, 3639 does not allow direct contact with a representative at the La Source financial center. The call is directed to a national platform. For a specific request requiring processing by La Source, the telephone advisor forwards the request to the relevant center. Postal mail remains the most reliable channel for formal requests.
Postal address of the financial center
The complete address for any correspondence is: La Banque Postale, Centre Financier, 45900 La Source Cedex 9. The building is located at 1 rue Édouard Branly. No physical customer reception is provided on-site: this center exclusively handles operations by mail and electronically.

Online space and management of the account linked to La Source
The online interface of La Banque Postale allows clients to find their associated financial center without going through 3639. Once logged into the client space, the section related to account information displays the managing center and its postal address.
The online space covers most routine operations: balance inquiry, transaction history, transfers, issuing of bank details, management of beneficiaries. For these operations, the association with La Source or another financial center does not change the user experience.
Field feedback varies on this point, but some clients linked to La Source report variable processing times for operations requiring manual validation (oppositions, card limit changes). These delays depend on the center’s workload at the time of the request and are not specific to La Source.
- The bank details mention the financial center code, useful for identifying La Source as the manager
- Incoming mail to the center is digitized and then processed in the order of arrival
- Responses to written complaints follow a regulatory timeframe, usually a few weeks
The La Source financial center handles a significant volume of accounts on a national scale. The centralization initiated by La Banque Postale makes this Orléans address a crucial point for the administrative management of many clients, well beyond Loiret. Checking one’s associated center remains the first useful reflex before any mail or formal procedure.