Anytime you have a problem with a hardware, check the manufacturer website for "Where To Buy" tab.
It will list the distributors details so you can go directly to them.

Receipt or warranty card is never needed for computer parts.
Although some distributors doesn't allow end user to directly go to them for RMA purposes. Call them in advance for any enquiries.

Always try to send directly to the distributors first. As this the easiest and fastest method compared to sending it to the shop.