You will also need business cards, a brochure and letterhead. Once seasoned, an auditor can do 1 to 2 claims per day. A slow rate would be 2 to 3 per week. Master your state's tariffs, the maximum rates charged and profit percentages assigned to utility companies as regulated by public utility commissions. If a utility company is charging your customer above the set tariff, you have found a refund candidate.
Tariffs are public information.
You can request a copy from your utility carrier, free of charge.