Reports that the company now requires consumers to find their own packaging when sending in an Xbox 360 for repair are "inaccurate," a Microsoft spokesperson told us. The company has always given two options and "this policy is global, not region-specific." Customers have the choice of either printing an e-Label (and providing their own box) or receiving a coffin from the company (this should take about five business days).
The representative did "confirm that the same policy applies to all scenarios, regardless of the repair." So, just to clear up any future confusion: There should always be the option of receiving a coffin when dealing with an Xbox 360 repair scenario.
Reference -- Official Microsoft repair FAQ
Reference -- Online console repair support