The Tories brought the legal action against Reckless following his re-election under the Ukip banner.
His former party are asking for over £3000 to account for leaflets printed in anticipation of the 2015 general election.
In a mass email, Reckless begged Ukip members to throw in £7.30 (or more) in light of his 7.3% majority over the Tories in the Rochester and Strood by election.
Addressing his entire mailing list, he said: "It is almost Christmas: a time for caring, reflection, and forgiveness."
The local Conservative Association said: "Given Mark is a trained barrister and this is a small claims case, we rather assumed that, like us, he would be representing himself. We’re surprised he’s lawyering up."
The anti-EU party are dubbing the lawsuit a "sour grapes legal challenge", implying the local association are just being stroppy about losing the seat as a result of Reckless's defection.