The Electoral Comission has fined the Conservative party £70,000 for overspending in election campaigns.
The independent elections watchdog said the party had made "numerous failures" in reporting its expenses for the 2015 General Election and three by-elections in 2014.
It found that the 2015 General Election spending return was missing payments worth at least £104,765 and payments worth up to £118,124 were either not reported or were incorrectly reported.
The watchdog said the party spent too much in the Rochester and Strood by election in 2014 and in the general election in South Thanet.
A separate police investigation's under way into the South Thanet campaign.