What action is required if the old sticker cannot be transferred?

If the old sticker cannot be transferred, the appropriate action is to write "damaged" on the old sticker. This practice serves to clearly indicate that the sticker is not valid for use or transfer due to its condition. It provides a transparent record for both the inspector and the vehicle owner, showing that the original sticker cannot be applied to the vehicle for compliance purposes.

Writing "damaged" ensures that there is no confusion about the status of the inspection sticker. It helps in maintaining accurate records and tracking, which are crucial for regulatory compliance and safety inspections. This action also informs future inspectors or law enforcement that the sticker is not in a usable state, thereby preventing any potential misunderstandings about the vehicle's inspection status.

The other actions do not sufficiently address the issue of a non-transferrable sticker. Leaving the old sticker in place does not clarify its status, simply writing a note to the customer does not document the change on the sticker itself, and replacing the sticker without proper documentation could lead to confusion and lack of traceability in the inspection process.