what is a counter-claim
Compulsory Counterclaim. A compulsory counterclaim is a claim made by a defendant against a plaintiff that arises from the same transaction or occurrence as the plaintiff's claim.The claim is compulsory in this situation in that it must be raised in the defendant's answer, or it is waived. compulsory counterclaim is a claim made by a defendant against a plaintiff that arises from the same transaction or occurrence as the plaintiff's claim.