So ive had people come through my lane with 'gift registries' and such and i have no idea what they are and no one has really taught me what to do so what am i supposed to do with those? Also a lady came to me with something she payed for online and was picking it up from the store? and neither she nor i knew what to do and i told her she could leave with her item without scanning anything because i didnt know what to do and she had proof she had payed for it online.. what is that called and what am i supposed to scan or do?