1.. Contact the county auditor and advise of the father's death. Most auditors will then direct the bank to freeze the account until further notice. I would also show the bank a copy of any informal death notices that have been published. If anyone has a power of attorney for the decedent, although it technically expired at death, the POA could cancel the withdrawals.
2. While death generally makes a contract void, the exact contours of the decedent's obligation to the landlord are vague at best. If everything has been removed from the apartment, it has been cleaned, is ready to rent again, then the estate has a strong argument that there is no further obligation to the landlord. However, if the dwelling cannot be rented immediately because of the decedent's belongings, etc, then the estate may very well be liable. ANY secured loans of the decedent, like car loans, MUST be paid post-death or the creditor can repossess the collaterall.
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