If you have a claim against the estate, you have a limited time to submit it.
"The Oklahoma Probate Code has devoted an entire chapter to address what is a proper and valid claim or debt, what constitutes proper notice, when such claim or debt must be paid, how to properly reject or approve a claim and the consequences of such approval, rejection or failure to provide notice. Chapter 7, “Claims Against the Estate,” Sections 331-354 of the probate code, provides a detailed roadmap for navigating the potential landmine that is the world of creditor claims. . . .
Chapter 7, “Claims Against the Estate,” Sections 331-354 of the probate code.
Within two months of appointment, every personal representative [executor or administrator] must give notice of the decedent’s passing to any known creditors or reasonably ascertainable creditors and advise them that claims not timely presented are forever barred.
The personal representative must also mail such notice to any known creditors – those the personal representative actually knows of or through reasonable efforts could have located.5 All prospective personal representatives should go through the decedent’s effects (safe, filing cabinet, mail, etc.) in search of potential creditors.
Once a claim is presented [by the creditor], the personal representative must approve or reject it, either in part or in whole.
Allowed claims must be approved by the judge, who must likewise allow or reject the claim. If the judge approves the claim, the personal representative must file the claim with the court clerk within 30 days.
Rejected claims, however, do not require approval by the judge, but notice of rejection must be mailed to the creditor within five days of the rejection.
If the personal representative fails to approve or reject the claim, it is presumed rejected on the 13th day after it was presented.
Upon receipt of the notice of rejection, the creditor has 45 days to bring an ancillary proceeding or an independent action on a claim currently due or two months after the claim becomes due."