You can call before you have every document or a final balance. The property address and the notice or statement in front of you are enough to start the conversation.
Helpful records include a property-tax notice or account statement, a creditor or mortgage payoff statement, a lien or court notice, a deed, and parcel information if you have it. The creditor or tax office can confirm its current balance and payoff instructions. The title company checks ownership and recorded claims as the sale moves forward.
The Muskegon County Register of Deeds is the county land-records office. Its records can help with recorded deeds and other land documents; they do not replace a current payoff from a creditor or tax office.