The automobile club ADAC tells drivers to write down every job in the repair order, together with the completion date. Je genauer der Werkstattauftrag schriftlich formuliert ist, desto besser lassen sich Streitigkeiten vermeiden. The more precisely the order is written, the easier it is to avoid disputes. It also advises setting a written cost limit. A court case shows the limit holding. A customer asked a workshop to find and repair an electrical fault, with an agreed limit of 2,000 euros. The workshop claimed the limit had been raised to 5,000 euros orally. In August 2013 the Higher Regional Court of Karlsruhe ruled that the customer owed no more than 2,000 euros. A note on the order without his countersignature proved nothing.