Adding the mention of the author of the writing after the fact does not solve the situation.
The user lied twice. First time lied about being the author of ALL photography in that first post that we commented on.
Then lied about being the author of all text in the other post that we commented on.
When we showed the evidence, the user started lying that it was a mistake and trivialise the situation.
Anyway, this case is closed. The user is permanently blacklisted.
We have wasted enough time.
We have dozens of other accounts/users we need to take action against today.