Okla. Stat. tit. 12, § 12-2020: Permissive joinder of parties

PERMISSIVE JOINDER OF PARTIES

A. PERMISSIVE JOINDER.

1. All persons may join in one action as plaintiffs if they

assert any right to relief jointly, severally, or in the

alternative:

a. in respect of or arising out of the same transaction

or occurrence, or

b. if the claims arise out of a series of transactions or

occurrences and any question of law or fact common to

all these persons will arise in the action, or

c. if the claims are connected with the subject matter of

the action.

2. All persons may be joined in one action as defendants if

there is asserted against them jointly, severally, or in the

alternative:

a. any right to relief in respect of or arising out of

the same transaction or occurrence, or

b. if the claims arise out of a series of transactions or

occurrences and any question of law or fact common to

all defendants will arise in the action, or

c. if the claims are connected with the subject matter of

the action.

3. A plaintiff or defendant need not be interested in obtaining

or defending against all the relief demanded. Judgment may be given

for one or more of the plaintiffs according to their respective

rights to relief, and against one or more defendants according to

their respective liabilities.

B. ACTIONS INVOLVING PROPERTY. In actions to quiet title or

actions to enforce mortgages or other liens, persons who assert an

interest in the property that is the subject of the action may be

joined although their interest does not arise from the same

transaction or occurrence. The court may order separate trials to

prevent delay or prejudice.

C. SEPARATE TRIALS. The court may make such orders as will

prevent a party from being embarrassed, delayed, or put to expense

by the inclusion of a party against whom he asserts no claim and who

asserts no claim against him, and may order separate trials or make

other orders to prevent delay or prejudice. In determining whether

to allow joinder under this section or to order separate trials, the

court shall consider if in the interest of justice such action

provides a fair and convenient forum for all parties.