In Missouri, creditor claims against a decedent's estate must be filed within six months from the date of the first publication of the notice to creditors. Notice is typically published by the personal representative of the estate. Creditors must present their claims in writing, detailing the amount owed and supporting documentation. The personal representative reviews and approves valid claims before payment from estate assets. Claims not filed within the statutory period are generally barred, ensuring timely resolution of estate debts and distribution of assets to beneficiaries.