The answer is yes, it is possible for a hard case to scratch a phone. However, it is unlikely that this will happen if the case is made from a high-quality material such as aluminum or polycarbonate. Cases that are made from softer materials such as silicone or leather are more likely to cause scratching. Additionally, if the case is not properly lined up with the phone, it can rub against the device and create scratches. To avoid this, make sure that the case is properly aligned before putting it on your phone. With a little bit of care, you can keep your phone looking like new for years to come.