Toiveling at a Store

37. L’chatchila, one should not toivel a dish in a store’s mikva until he acquires it via meshicha or hagbaha and pays for it because as long as it belongs to the store, it is considered merchandise, which does not have a chiyuv tevila. Nevertheless, if a non-Jewish worker – who may toivel dishes (שו"ע סי' ק"כ סט"ו ) – took a dish from a customer's cart and toiveled it with a Jew watching (רמ"א שם ) before the customer paid, the customer is yotzei and does not need to toivel it again.