1. A method, comprising: receiving, by a payment service provider system comprising one or more computers, an image representing a payment coupon; determining, by the payment service provider system, an identity of a biller associated with the payment coupon from the image; determining, by the payment service provider system based on the identity of the biller, that no payment coupon metadata for obtaining one or more fields from the payment coupon is stored in association with the biller; requesting, by the payment service provider system responsive to determining that no payment coupon metadata is stored for the biller, a respective set of one or more field indicators representing at least an approximate size or an approximate location for each of the one or more fields within the image, wherein requesting the respective set of one or more field indicators for the one or more fields within the image further includes, presenting the image to a user, and instructing the user to graphically indicate on the image at least the approximate size or the approximate location for each of the one or more fields; receiving, by the payment service provider system, the respective set of one or more field indicators for each of the one or more fields within the image; and storing, by the payment service provider system, the respective set of one or more field indicators for the one or more fields within the image as at least a portion of the payment coupon metadata, wherein the payment coupon metadata is stored in association with the biller.