6. The method of claim 5 , wherein the identifying of the seller comprises detecting a match between the source and a seller telephone number associated with the seller, the seller telephone number being included in a seller record corresponding to the seller.
6. The method of claim 5 , wherein the identifying of the seller comprises detecting a match between the source and a seller telephone number associated with the seller, the seller telephone number being included in a seller record corresponding to the seller. 7. The method of claim 6 , wherein the seller record is generated by: detecting user login of the seller into the marketplace website; receiving user input of the seller telephone number via the marketplace website; and associating the seller telephone number with the seller.