Your father's debts will remain his debts.
In general, as legal guardian or conservator, you will be personal liable for debts you officially incur on his behalf only if:
- you agreed in advance to be personally responsible, such as by co-signing or guaranteeing a particular transaction
- you are liable for the debts because of another legal relationship that results in a duty of support, such as you claim your father as a dependent
- your negligence caused the debt, or
- you acted beyond your legal authority as guardian or conservator in incurring the debt.