Invoices and payments must be in the name of the registered bidder, whether an individual or a third party. The bidder's name must match the name on the invoice and payment method used. This is a standard practice to ensure proper tracking and ownership of the items being sold.

If the third party wishes to pay using their own payment method, they can register as a bidder with Sotheby's and bid on your behalf, but they will need to provide all of the necessary registration information and be approved by Sotheby's prior to bidding.