Press all seams either open or to one side. (Whichever you prefer.)
Trim all loose threads. (Don’t forget the back of the quilt top!)
If your quilt top is directional please mark the top either by pinning a note or using a piece of painters’ tape.
Ensure the backing is at least 4” larger than your quilt top, on all sides. (This is necessary to accommodate proper loading and clamping)
Ensure both top and backing are square. (There are many methods of squaring up a quilt. If you are unsure of what to do, search YouTube for “How to square a quilt”)
It’s always wise to wrap your quilt in plastic before shipping, in case the box gets wet in transit.