> It is also a strong possibility but wouldn't Mangopay would have given some time for Librapay to adapt to the regulation ?

No anti-money laundering law doesn't work that way

> The fact that they stop the contract so soon without previous warning (unless Librapay is not disclosing everything) is what make it really weird for me.

That is completely normal (in fact giving notice is pretty lenient), if a financial institution suspects you of money laundering weird things will begin to happen to you such as freezes, orders being ignored, surprise account closures, etc. You will under no circumstances receive an explanation as that in itself is a serious criminal offense because it is considered to be helpful to money launderers when you explain to them what they did that aroused suspicion.

Note to readers: if weird things start happening to your bank account (delayed or ignored payments, logouts, etc) get on the phone to the bank and be as helpful to them as you can be. That is typically the only way to get this resolved.

With apparently 13 k€ per month processed, how much could they launder?

No harm would have been done by giving them a few months grace period.

The amount is irrelevant.

Financing Nazis is illegal, especially in France, which had a bit of an economic setback about sixty years ago because of them. Oh, and a lot of death and suffering.

https://github.com/liberapay/liberapay.org/issues/11

That thread is not about money laundering, and it's two years old.

So basically if you're literally money laundering for cartels like HSBC, it's cool you've got plenty of time, but if you're a bit player for charity you should be blocked? Doesn't sound legit to me.