The money thread put me in mind of this: are there circumstances under which a therapist should morally not accept payment for a session?

Let's say in session a therapist makes a serious mistake that profoundly affects a client. I'm talking profoundly, not they say something the wrong way and upset the client. (I know someone will nitpick at what serious and profoundly mean. Just define them for yourself. Eta - define mistake for yourself too. This is not an objective enterprise.)

In case this matters, let's say the hourly fee is $150. Client pays out of pocket.

I would say a session in which a therapist terminates a client against their will qualifies. I can think of other scenarios - maybe a therapist runs a session so insensitively that a client self-harms in response. Etc.

Legally and contractually, the therapist should get their fee. But should they refuse to accept it or refund it as a way of alleviating their mistake?

(I would be curious as to whether this has actually happened to anyone. No. 2 once told me that if an EMDR session she runs doesn't turn out well and makes the client worse and the client has to return for an emergency session, she doesn't charge them for the extra session.)