Specifies the current relationship between the seller and the potential buyer.
A seller can make a Transaction Confirmation Request (TCR) for an item
to a potential buyer if the buyer meets one of several criteria.
A TCR is sent by a seller to one of the following
a bidder, a best offer buyer,
a member with an ASQ question, or any member with a postal code. See the values and annotations in RecipientRelationCodeType.