Send to a Friend

Are there laws governing what percentage of donations must go to the cause?
Let’s say I start a charity, are there laws dictating the minimum percentage of funds donated that must go to the cause? I see reports of only 10% going where people think their money is going, and of course everyone is in an uproar when they see things like that, but is it illegal?
If there are minimums what are they?
Using Fluther
or