Ordered a Nikon battery at a 'too good to be true' price and it arrived a few days later. It all looked very legit, with a flat-packed Nikon box, instructions and plastic end cap on the battery itself, but on checking the Nikon website for counterfeit advice, it confirmed that their batteries do not have the model number stamped on the front, while the sticker on the reverse looked skewed and not applied correctly. I contacted the seller through OnBuy and they quickly refunded my Paypal payment, which was helpful, but it just confirmed my suspicions, because if the product were genuine, a reputable seller would dispute this and certainly wouldn't refund me without requesting I return the item. It sounds like I was lucky because it appears many people don't get their money back, and my purchase was relatively small. When it comes to the Paypal transaction and protection, the OnBuy site has lots of caveats in their Ts&Cs saying they're just the middleman, the contract is with the seller and they aren't responsible for their sellers' etc. etc. which, even if it's legal, isn't helpful and is just poor customer service. The last thing I'm going to do is use a counterfeit battery in my pro camera, so it's going in the recycling. If you're reading this review, just don't bother.