Key facts: Missouri small estate threshold is $50,000 for simplified affidavit procedures; mandatory 30-day creditor notice period applies to all probate estates; Missouri eliminated state inheritance tax in 1980; surviving spouse homestead rights are protected under Missouri law; estates exceeding federal exemption amounts remain subject to federal estate tax; personal representatives must publish creditor notice in local newspaper; all heirs must execute small estate affidavit for direct asset transfer.