The silvers are the real old ones and have Cash Only printed on them (its YMMV if the person checking you out will see that). The white ones are old ones, doesnt say cash only. Then theres the new ones that sort look like the old white ones but has some blue on it and once again says cash only on them, so back to YMMV if the person will see that and not let you get them with a CC. Then its YMMV if even w/o cash only on them if the store is hard coded against CCs , or if not hard coded will sell a reload card usinga CC