If you are engaged as a well contractor in Minnesota you are required under Part 4725.0650 of the Minnesota Rules to file a Minnesota Well Contractor Bond as a condition of licensure.
Bonds Express offers a Minnesota Well Contractor Bond with a 99% approval rate.

A surety bond protects the party requesting the bond, the Obligee, against any financial losses as a result of poor financial decisions, damages, unethical decisions, or a failure to follow state and local laws on the part of you, the Principal. The Minnesota Well Contractor Bond holds you accountable for your business decisions.

By possessing a Minnesota Well Contractor Bond, you are telling your Obligee that you can be trusted as a Principal and that you stand behind your business decisions.