Police are making enquiries after they received allegations of electoral fraud in the South Thanet seat, the constituency Ukip's Nigel Farage contested.
Kent Police said it has received a report of possible fraud taking place during the general election.
The South Thanet seat was won by Conservative candidate Craig Mackinlay, who was nearly 3,000 votes ahead of Farage, with the Ukip leader finishing in second place.
Following his defeat, Farage stepped down as leader but returned just a few days later after the party rejected his resignation letter.
The South Thanet seat was also contested by Labour's Will Scobie, Green's Ian Driver, Liberal Democrat's Russell Timpson and Al Murray, whose stand-up character The Pub Landlord contested as part of the Free United Kingdom Party (Fukp).
A police spokesperson said: "Kent Police has received a report into electoral fraud and enquiries are ongoing."