The number of complaints about the Charity Commission more than doubled in 2010/11 from the previous year, rising from 91 to 185.
The figure comes in the commission’s Customer Service Annual Complaints, Compliments and Feedback Review, published today.
It says 81 per cent of complaints were about the commission's decisions about how to deal with concerns about charities raised by members of the public.
"This intensifies the trend observed in previous years, where complaints have increasingly been about the commission’s decisions about where it draws its regulatory interests when it receives allegations of wrongdoing in charities," the report says.
Over the year, it says, the commission would increasingly "disengage promptly in cases where it was clear that our regulatory interest had not been triggered".
It says the most common reason for a complaint was "insufficient regulatory action", followed by "mistakes or unclear or incorrect advice".
The report says the number of unsolicited compliments received by the commission rose in 2010/11 to 4,325, compared with 2,088 the previous year.
The commission issued 22 apologies and three consolatory payments in 2010/11, according to the executive summary of the report.