My wife did that once as did a friend.
Strangely come renewal time they were asked about their accident even though they did not claim. And oddly, both renewals went up. (considerably)
Yes I know some do, some don't, some good, some bad. But they don't put it on their letter head or website. So who knows ??
Happened to me,Someone bumped into my previous car, grazed the front bumper. He asked to deal with this outside of insurance, which was fine with me.
I contacted my insurance just to give them a heads up in case it he doesn't pay up.
He paid up, all was fine.
Renewal came through, now I have to pay an extra 300/400 on top because of the non fault claim....