An investigation of the 2008 gubernatorial campaign of Republican Pat McCrory found no evidence of improper coordination with an outside GOP group.
The North Carolina State Board of Elections launched the probe in October in response to a 2010 complaint by the N.C. Democratic Party.
The complaint alleged McCrory's campaign coordinated fundraising and spending efforts with the Republican Governors Association, which if true would be a breach of state and federal campaign-finance laws.
A copy of the state report obtained by The Associated Press showed that investigators found no evidence the allegation was true.
The elections board is set to meet Thursday to discuss the findings.
A second complaint against the McCrory campaign is still pending.
McCrory is running again for governor in 2012.