Which of the following is not listed as being seized when a station is suspended?

The correct choice indicates that customer complaints are not typically seized when a station is suspended. In the context of Pennsylvania state inspections, when a station's license is suspended, authorities often focus on tangible items that relate directly to the operation of the station. This includes unused stickers, which are critical for conducting inspections, as well as inspection records that keep a detailed account of all inspections performed, ensuring compliance with state regulations. Additionally, the Certification of Appointment is essential as it officially designates the station and its personnel to conduct inspections.

On the other hand, customer complaints, while important for assessing the performance and service quality of the inspection station, do not represent physical assets or documentation that would be directly seized. These complaints are more informational and are usually managed through separate channels for consumer protection rather than being part of the tangible items taken during a suspension. Therefore, this distinction highlights why customer complaints are not included in the list of items to be seized.