I can answer that.
You are referring to the credential stuffing attack that took place last summer. The identities of some Canadians were stolen by other sources. We don't know what those sources are specifically, but we do know that there were other events that affected the Canadian economy.
This information is often found on what is known as the dark web, which is sort of the criminal side of the Internet. Criminals take people's identities or whatever information they can gather and try to use it in federal systems. When we saw that there were a lot of attacks on people's identities, we made the decision to shut down the service. We wanted to make sure there were no more significant attacks. Subsequently, the Canada Revenue Agency verified the transactions. In all suspicious cases, citizens were contacted or the situation was reversed.