Keep the confirmed fault, work completed, part references and any operating or follow-up instructions together with the appliance model. Record whether associated controls, mounting or drainage were included in the work.
What the observation tells you
This helps a later engineer distinguish a recurring appliance symptom from an unrelated sink issue. A receipt saying only repair gives less useful history than a concise description of the completed scope. Keep any applicable repair guarantee terms without assuming they cover every future problem.
A useful next step
Add the date and the service contact, and store photographs of replaced accessories if helpful. Follow the return-to-use advice supplied for the specific repair.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.