This person receives your product but they MAY or MAY NOT be your customer (maybe someone who can deliver it to your customer like their relative or friends but not some delivery company). Also, their details are added to under 'Shipping Details' by the customer maybe because your customer doesn't have a permanent address yet.
What do you call this person? Some names I thought of were 'receiver' or 'referee' or 'trustee' but I don't think they're accurate enough in business terms.