In the Affiliate Manager where you attribute sales to an affiliate, there needs to be a way to search for and attribute sales that were made by paying invoices that include a specific custom_field (like their iam_id or something else). This way we wouldn't need to individually search for each contact and then the specific transaction and then attribute to the affiliate but could just search for the affiliate_id (or other custom field that was placed on the invoice) and simply check them from the list of search results and then bulk attribute them to the affiliate.