groupon does not notify customers if something is wrong on their end. they lock users out of their system through a harsh feedback loop when they sign in that says to reset the password they change internally then your email opens a link that claims no account is linked with that file. they did this to me, my partner and my friend - preventing us from accessing our previous purchases and demanding a bunch of information related to their account we have on file. meanwhile two of the three aforementioned were not even card transactions but used with groupon bucks from expired reimbursements. corrupt company. used to be cool. no customer service. chat people in a foreign country take days to respond just to offer the same runaround. my partner won his claim with his bank who informed him 'it's a thing' according to their end. they just get away with this, BEWARE!