A When a product is returned to Adidas for a refund - this is specifically in relation to online orders placed in the UK and Europe - the product is examined by the 'Quality Assurance Department' before a refund is issued. The Quality Assurance Department will examine two types of returns:
Adidas currently have a Voluntary Return Guarantee that allows online customers to return a product within 100 days if they are not satisfied with it. However, the returned product must have it's: original packaging, original label, and not be used / damaged beyond a normal inspection (ie, worn to see if it fits correctly, not worn in general use).
Secondly, sometimes, though rarely, Adidas will ship products that have a manufacturing fault; in this scenario a customer can return the product for a full refund. However, the Quality Assurance Department will check that the product has not been damaged due to misuse or negligence. Customised products will also be issued with a full refund if they have a manufacturing fault; customised products will not be issued with a refund for any other reason.
Online orders (UK) are currently returned to the following address: CDC Rieste, Hildesheimer Strasse 4-10, 49597 Rieste, Germany. This is the address of the Adidas warehouse that ships online orders in Europe; it is probably the location of the Adidas Quality Assurance Department.