Wish I could leave less than one star. It's bad enough to not be able to use my barcodes purchased from nationwidebarcode on Amazon, considering that was the only place that requires them, but after spending weeks, and MANY hours reading all of their info and trying new ways to get told no, the owners attitude and help is beyond frustrating. If your entire site is full of ways of telling you you are going to have a complete nightmare using the barcodes, why buy from there? I unfortunately purchased many barcodes, that are totally useless numbers on paper. I have wasted so much of my valuable time getting no where. Each day nationwidebarcode and Amazon hinder my sales, I am losing money and neither company seems to care. Read each bad review here and know that it will happen to you if you buy from nationwidebarcode.com. When the first thing the site says no refunds or exchanges it just shows he knows he's selling useless numbers to everyone that buys them, do not waste a bunch of time and money on his useless barcodes. His attitude says he knows and doesn't care, and is just happy some people are still buying his useless numbers unknowingly. VERY unhappy and mad. Not only do I deserve numbers that work from nationwidebarcode.com, I deserve something for the 40+ (not exaggerated) hours wasted, and days without selling my products that sell many times a day elsewhere. Wish I would have purchased anywhere but there!