Do non-serialized items like adapters and headphones require an RA number?

Non-serialized items do not require an RA number but still require pre-authorization from TSD before return.

Non-serialized merchandise such as adapters, headphones, case parts, or similar items do not require an RA number but still require pre-authorization from TSD before returning.

Do non-serialized items like adapters and headphones require an RA number? | KAWAI FAQ