- Instrument type, make and serial
- Acoustic guitar, harmonium, tabla, keyboard or violin, with make and serial: the description identifies the instrument and explains the scope of work.
- Work performed
- Tuning, setup, fret levelling, reed tuning, skin replacement or electronics repair: list each task so the customer understands the charge.
- Parts fitted
- Strings, bridge pins, tuning pegs, pickups or keyboard contacts should be listed with quantity and price. Parts are goods and need their own lines.
- Condition at intake
- Note cracks, warping or missing parts when the instrument arrives. This protects the workshop if the customer later blames the repair.
- Tuning standard
- Some customers ask for a specific pitch or a scale tuning for harmoniums. Recording the standard agreed helps if the customer later asks for re-tuning.
- Delivery date and warranty
- Musicians often need instruments for a performance. State the promised date and any warranty on the work.