Originally Posted by
Cavemonster
Lack of receipt wouldn't be an issue. The policies you link to said quite clearly that while a receipt is requested, it isn't required.
It says they'll do their best without one, not that there won't be issues. Based on my experience, and the many experiences reported by others, their best is going to vary depending on the nature of the item being returned. It's also likely to vary depending on the expectations of the customer.