In this scenario your supplier makes all information about his delivery transparent to you via the GLOBALG.A.P. Bookmarking. Your supplier keeps the list in the GLOBALG.A.P. Database updated for you and names you as follower. Via this list your supplier can make all his deliveries transparent by naming the origins (GGN, product) tupel and optionally adding delivery information, e.g. SSCC, GTIN, ETA, delivery date, … You maintain a list of GGNs with their products in your IT system representing the deliveries and constantly update this list with the master data and certification data for each (GGN, product) tuple out of the GLOBALG.A.P. Database.
Let your supplier create a bookmarking list via bookmarkListInsert and explicitly set you as follower
Let your supplier constantly add his deliveries as (GGN, product) tuples by adding bookmark items containing the producers GGN and the products ID and optionally delivery information via bookmarkItemInsert
Ping the bookmarking list to receive the producers master data, product certification data and the delivery information (if entered by you) of your suppliers deliveries via getBookmark