He also failed to register his mayoral committee before accepting campaign funds, the agreement said.
The commission accepted Mitchell’s defense that the $408 for Falcons tickets was reimbursement to a law firm for lobbying expenses. The commission declared the expense allowable under “ordinary and necessary” expenses under Georgia code.
The commission said there was insufficient evidence that Mitchell’s PAC violated registration rules.
In a statement, Mitchell blamed the problems on clerical errors and promised better oversight of administrative duties.
“We have taken immediate steps in upgrading our campaign finance technology and internal administrative procedures to ensure that all reports are filed properly,” he said.