If you buy a reset in the game shop, your current standing in one of the league categories is automatically reset to zero. This cannot be undone!
You can get resets in most games for the following categories:
score in the current quarter league
Chips score in the current month's Chips league
star rating
verage score over the last 50 rounds (friends list)
all four categories at once
You can find more details on our league info page.