Our system is built to ensure high quality deliveries and to prevent humans from making mistakes. We rarely ship the wrong product. Even with all these measures it is always possible to make a mistake. If we sent the wrong customer, you can request a replacement below.
It happens more often that customers order the wrong case. Please check carefully if you and your customer ordered the right case. It’s also possible that your customer thinks he or she has an iPhone 7 but it’s an iPhone 7 plus for example. Some models look very similar and customers are not always aware of the model they have. Please verify the model your customer has before requesting a replacement.