Koeur24: verifying members' addresses by mail to build trust

Koeur24, the Belgian dating app with verified profiles

Koeur24 is a Belgian dating app launched in 2024. Its positioning: serious dating, built on verified profiles. In a sector plagued by fake accounts and romance scams, trust is the real product.

What remained was to make that verification credible — and hard to fake.

The challenge: proving a member really exists

Verifying an email address or a phone number proves little: both can be obtained in minutes, in bulk. To raise the trust level, Koeur24 wanted a stronger signal: confirming that a member has a real postal address, in Belgium.

But a postal address cannot be verified with a simple form field. You have to send something to that address, and check that the person received it.

The solution: address verification by mail

Koeur24 integrated the Bjet24 API to add an optional postal verification step. The principle is classic and proven: the app generates a unique code, and Bjet24 prints and sends a letter containing that code to the address declared by the member. On receipt, the member enters the code in the app — and their profile earns an "address verified" badge.

An address that receives mail is a real address. A member who enters the code has physically held it. It is a simple hurdle for an honest user, and an expensive one for a fraudster trying to create accounts in bulk.

Why mail, in an all-digital era

It is precisely because everything is digital that mail regains value. A physical channel:

• cannot be faked in bulk: you need a real address, and access to it;
• deliberately slows down the creation of fake accounts — delivery time becomes anti-abuse friction;
• inspires trust: an "address verified by mail" badge is concrete and understandable to everyone.

What it brings Koeur24

• Fewer fake profiles: postal verification filters out accounts created in bulk.
• A trust argument: serious dating becomes a verifiable promise, not a slogan.
• A lightweight integration: generate a code, call the API, wait for entry — a few days of development.

In summary

For Koeur24, Bjet24 turns a simple letter into proof of existence. In a dating app, that is exactly what separates a credible profile from a suspicious one. Trust is not declared — it is verified, sometimes through the mailbox.