Rule reminder
Register is determined by audience, medium, and purpose. A tweet can use any idiom; a legal contract cannot. A conversation with friends welcomes color and humor; an academic paper requires precision and neutrality. For each context, ask: who is reading/hearing this, and what level of formality do they expect?
A lawyer is drafting a formal complaint to a regulatory authority. She wants to state that the company has distanced itself from the illegal practices of a former partner. Which version is appropriate?