Hey Janet--
You should have a "Puzzling Postscript" on your order form stating that all puzzles require full payment beforehand....
My boss requires full payment at the time of purchase, period. Unless it's a regular customer, or a corporate account that needs to get a corporate check issued for the amount.
People often whine about the full payment, and I always smile, and point to the bins under the counter and in the back, and say, "I know, it does seem ridiculous to imagine, but some people don't come back for it even when they've already PAID for it!"
Which is true. Our bins are overflowing with orders that are already paid for; a few are over a year old.
Most people understand; a few have gotten furious, and screamed at me that THEY DON'T PAY FOR ANYTHING THEY HAVEN'T SEEN, and I kindly inform them that if there is anything about the workmanship that they don't like, we'll be happy to take care of it...and as for the color/design, that's why we encourage them to take as long as they like deciding what really works.
And then I smile a whole lot.
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I don't care what color your sofa is.