Open and administer a probate estate with a document checklist. Collect the original will and codicils, death certificate, petitioner information, heir and beneficiary names and addresses, asset inventory leads (real estate, accounts, vehicles), known debts, and any existing trust or nonprobate designations so counsel can prepare the petition, notices, inventory, and accountings. For executors, family members, and estate attorneys. This is not legal advice; probate procedures, small-estate shortcuts, and bond rules vary by state and county—confirm current local rules before you file.

Do not unstaple. Note the drafting attorney if known. Include a copy if the original is in a sealed box.
Order from the vital-records office. Banks and title companies each want their own.
Include any priority under the will or statute and a list of persons with equal or higher priority.
Needed for formal notice. Include minors and unknown heirs if that is the fact.
Note whether title is joint, TOD, or in a trust. Out-of-state property may need ancillary probate.
Mark which accounts have POD/TOD or named beneficiaries so they can be treated correctly.
Keep envelopes from creditors. Do not pay debts until counsel advises on priority.
Collected so the family sees what is outside the estate and what still needs claims or tax work.