Okla. Stat. tit. 12, § 12-139: Other actions - Venue when creditor has assigned right

Every other action must be brought in the county in which the

defendant or some one of the defendants resides or resided at the

time the claim arose, or may be summoned; except claims against

makers of notes, claims, or other indebtedness which have been

assigned, sold or transferred by or from the original payee or

obligee, which claims against such original maker of such notes,

claims or indebtedness can only be brought in the county in which

the said maker of such note, claim or indebtedness or some one of

the original makers of such note, claim or indebtedness resides or

in the county in which the claim arose. Provided, however, this

section shall not in any way change or limit Section 131 of this

title.