Konica Minolta Magicolor 3300 User Manual page 190

Attention
Don't return any merchandise to the manufacturer without calling for a
Return Merchandise Authorization (RMA) number (Americas only).
Refer to the Service & Support Guide or www.konicaminolta.net/printer/
for the Technical Support telephone number where you can obtain an
RMA number. If the RMA number is not prominently visible on the
outside of items returned, KONICA MINOLTA will not accept receipt.
182 Warranty Considerations