RSA 358-D:11 Notice Requirements.

Each motor vehicle repair facility shall conspicuously post a notice of no fewer than 6 square feet on the premises of the facility for the purpose of advising any customer of his rights under this chapter. The notice shall contain the following information:
I. The motor vehicle repair facility must provide to any customer upon request a written estimate for service or repair work to be performed and cannot proceed to perform such work unless written or oral authorization is obtained;
II. If additional repair or service work of an unrelated and different nature from the work originally itemized in the written estimate becomes necessary, it must notify the customer of the estimated cost of such additional repairs and obtain his written or oral permission to proceed;