Every year, the CAF asks landlords to report their tenants’ rent online if they receive housing assistance. Access to the landlord portal on caf.fr requires a login ID sent by post or email. Losing this ID or never receiving it prevents you from submitting your rent declaration online and may delay housing benefit payments to your tenant.
CAF login ID and landlord number: two details not to confuse
Confusing these two details is the most common reason for being unable to log in. The user number (or landlord code) consists of 14 digits and starts with the department prefix (for example, 348 for Haut-Rhin, 974 for Réunion). This number identifies the landlord in the CAF system, but it should not be entered in the “username” field on the login page.
The login ID, on the other hand, is a string that starts with “LOG” followed by digits (such as LOG974xxx or LOG348xxx). This is the reference you need to enter on the “Mon Compte Partenaire” page to access the landlord portal. Entering the user number instead of the LOG ID will always result in an error.
To find your CAF landlord account ID, first look for the letter or email from your local CAF office inviting you to report your tenants’ rent. Both references (the user number and the LOG ID) are usually included.
Recover a lost landlord ID online
The “Mon Compte Partenaire” platform offers an account recovery process accessible from the login page. The “Trouble logging in” link opens a series of options, including having your username and password sent by email.
You’ll need to provide two details:
- The email address registered with the CAF when the landlord account was created
- The 14-digit user number (the one that starts with the department prefix)
Once you’ve entered these details, the LOG ID and a temporary password will be sent to the registered email address. You must change the temporary password the first time you log in.
When online recovery doesn’t work
The process relies entirely on the email address linked to the account. If you can no longer access that address (the mailbox has been deleted, the domain is outdated, or you’ve changed providers), the system can’t send your login details. There is no online alternative in this situation.
A testimonial published on the Services Publics + platform in October 2026 illustrates this limitation: a landlord whose ID had changed and who had lost access to their old email address was only able to recover their login details after contacting CAF support directly, which manually updated their account. If you’ve lost access to the registered email address, you must contact your local CAF office directly.
Contact your local CAF office when online recovery isn’t possible
Online recovery covers straightforward cases (a forgotten password or misplaced ID when the email address is still valid). For more complex situations, contacting your local CAF office is the only option.
Situations that require direct assistance:
- The registered email address is no longer accessible or isn’t recognised by the system
- You never received your ID or user number (no response from CAF after your initial registration)
- Your ID changed following an administrative update to your account
- You have multiple accounts linked to properties in different departments
The national landlord helpline number is 09 69 32 52 52 (local call rates apply). According to CAF documents, the helpline may have limited opening hours, often aligned with the annual rent declaration period in July.
Contact details and support options vary from one local CAF office to another. Some offices offer in-person appointments for landlord partners, while others provide support exclusively by phone or email. Check the opening hours and contact options on your local CAF office’s website to avoid unsuccessful attempts to get in touch.
First time logging in to the CAF landlord portal: what to watch out for
If you’ve never accessed the online portal before and received your login details by post, click the “Trouble logging in” link the first time you try to sign in. CAF guidance explains that login details sent by post require this activation step, rather than simply being entered directly on the login page.
The LOG ID and temporary password activate access to an online account where you can report the rent amount for July, notify CAF when a tenant moves out, report unpaid rent, or view the list of tenants receiving housing assistance.
Landlords already connected through a partner’s digital system
CAF notes that landlords using a digital network connected to their local office (for example, integrated property management software) are not eligible to use the standard landlord portal on caf.fr. This restriction may explain an unexpected access denial for a professional landlord trying to log in online when their declarations are already submitted through another channel.
Keeping a copy of the activation email and saving your LOG ID in a password manager are simple ways to avoid having to go through the recovery process again each year. The annual rent declaration is required to maintain tenants’ housing benefit entitlement, and a delay in the landlord’s access can temporarily suspend their payments.
