The requal or in this case qual test aka a hydro includes a visual inspection. However, most dive shops do not recognize this visual inspection. In some cases, it is warranted others it is not. Between the test and delivery anything can happen. Many mail order outfits will put a visual sticker on them before they are sent. But even with this if you bring an empty cylinder in for a fill the shop will probably require a new inspection. Especially if they realize that you bought it mail order instead of from them.
They way to get around the empty cylinder, as mentioned is to trans fill it so there is some gas in it. Few people have whips so the poor man's way is to hold two valves face to face,open the empty cylinder then the full cylinder. This will force a bit of gas into the empty cylinder. Close the empty cylinder, then the full cylinder.
BTW UPS will ship cylinders with 40psi in them so ask the mail order place if they can ship them that way.