Order II Rule 3 reads as follows:
“3. Joinder of causes of action
(1) Save as otherwise provided, a plaintiff may unite in the same suit several causes of action against the same defendant, or the same defendants jointly; and any plaintiffs having causes of action in which they are jointly interested against the same defendant or the same defendants jointly may unite such causes of action in the same suit.
(2) Where causes of action are united, the jurisdiction of the Court as regards the suit shall depend on the amount or value of the aggregate subject-matters at the date of instituting the suit.”
It is undoubtedly true that the law does not compel a litigant to combine one or more causes of action in a suit. It is open to a plaintiff, if he so wishes, however to combine more than one cause of action against same parties in one suit. However, it is undoubtedly true that the embargo in Order II Rule 2 will arise only if the claim, which is omitted or relinquished and the reliefs which are omitted and not claimed, arise from one cause of action. If there is more than one cause of action, Order II Rule 2 will not apply. It is undoubtedly also true that Order II Rule 2 manifests a technical rule as it has the effect of posing an obstacle in the path of a litigant ventilating his grievance in the Courts. But as already noted, there is an equally important principle that no person shall be vexed twice on the same cause of action.
Refer : Pramod Kumar & ANR. Vs. Zalak Singh & Ors.