Adcom GFA-555MS - Manual (Page 18)

When calling or writing about your GFA-555ms, be sure to note and refer to its model and
serial numbers as well as the date of purchase and the ADCOM authorized dealer from
whom it was purchased. In the event the unit must be returned for service, you will be
instructed as to the proper procedure when you call or write. UNDER NO
CIRCUMSTANCES SHOULD YOUR UNIT BE SHIPPED TO US WITHOUT PRIOR
AUTHORIZATION, OR PACKED IN OTHER THAN ITS ORIGINAL CARTON AND
FILLERS.
Always ship PREPAID VIA UPS, FDX OR OTHER APPROVED CARRIER. DO NOT SHIP
VIA PARCEL POST, since the packing was not designed to withstand rough Parcel Post
handling. FREIGHT COLLECT SHIPMENTS WILL NOT BE ACCEPTED.