Originally Posted by Jack L
If the trailer is currently registered in Washington, the seller leaves the current plate on the trailer and notifies Washington Department of Licensing that the trailer was sold.
Leaving the plate on the trailer places the SELLER in a potential "Responsible Liability" position should the purchaser have an "At Fault" accident on their trip home. Rest assured the injured party will sue anyone and everyone associated in any way with the vehicle/trailer causing the accident.
While the seller "may" ultimately be released from liability due to the sale of the trailer it will probably cost them some money and hassle to accomplish this.
NO WAY am "I" lending my "registered to me" trailer license
plate to the buyer to transport their "New" trailer!