Okla. Stat. tit. 67, § 67-48: Decree conclusive - Except when

Said decree of court, when entered, shall be binding and

conclusive: Provided, that any decree shall be subject to be opened,

modified, vacated or set aside on appeal sued within two (2) years

after the entry of such decree: Provided, further, that insane

persons and minors shall have two (2) years after their disabilities

are removed to prosecute a writ of error upon said decree: And

provided, further, that any decree entered upon any petition or

cross petition, which does not make defendant, by name, all persons

who shall be in possession of such lands or part thereof, at the

time of the filing of such petition, or which does not make

defendant, by name, all persons to whom any such lands shall have

been conveyed, and whose deeds of conveyance shall have been

recorded in the office of the register of deeds of such county since

the time of the destruction of the records, as aforesaid, and prior

to the time of the filing of any such petition, shall be absolutely

void as to such person omitted, but shall be final and conclusive as

to all others: And provided, further, that all defendants who shall

not be actually served with a summons in the suit in which such

decree may be rendered, shall have allowed to them one (1) year

after the entry of such decree within which, upon petition to the

court rendering the same, to have the said decree vacated and set

aside.