I need to know is this will be a favor from Apple store or it is that they need to do?
They don't
need to do it.
It is simply good customer service which. Apple is known for outstanding customer service.
The policy says you cannot return without a receipt but managers are given leeway in their own stores.
And they are usually more easy going about it with a new released product.
->
http://www.apple.com/legal/sales
policies/retailus.html
"Apple Inc.
Apple Retail Store Purchase Policies
Returns
For iPhone returns, please refer to the iPhone Sales Policy section below. For all other products, if you are not satisfied with your Apple purchase, return it with the original receipt and original packaging within fourteen (14) calendar days of the date of purchase. If the item is returned unopened, in the original box, we will exchange it or offer a refund based only on the original payment method. Apple will mail a check within ten (10) business days for cash, cash equivalent, and check transactions over $250. Please note the following:"