Credit Card Interest Question? Can a credit card company still charge interest on a credit card

Can a credit card company still charge interest on a credit card balance even after it's be turned over to a collection agency and they're threatening to sue? This doesn't seem officially recognized.

It depends on the vocabulary to which you agreed when signing up for the card. Depending on what you signed, and the ethical guidelines of the company from which the card was issued, the credit card company can do anything it wants while you still "owe" it money.
If you bought a TV when the card's APR be 9.99%, they can raise the APR formerly you pay rotten the TV for any reason they please.
It's decriminalized as long as it was disclosed surrounded by the fine print in that small booklet that they mail to you when they sent you the card.

Of course they can. It is still unpaid debt that you owe and it can still accumulate interest.

Answers: They can demand interest up to the date that the debt is compensated.

Yes, the debt is still unpaid.