My hubby makes fun of me for doing my research, but after reading everything on this site about the CC Fraud, we have made every online purchase for our vaping supplies with Visa Gift cards. We go to the site we want to order from, put what we want into our "shopping cart" then we go to the store and get a gift card for that exact amount. We do have to pay a 6 dollar fee for the gift card each time we get a card, but we figure with the amount we are saving not buying regular cigarettes and the aggravation of not having to worry or fix any fraud issues on our debit or credit card.....the 6 bucks is worth it!! 
I did fill out the form, though, with both vendors, as I'm not sure which one it was. I think it was the most recent one, but who knows. The most recent one had a lock symbol on their checkout page, but I didn't see one on the other site, but their checkout wasn't working when I rechecked it. I almost always check for that lock symbol when I'm purchasing something, but it doesn't always mean it's 100% secure. 