Today, XX/XX/XXXX, I attempted to use my Wells Fargo debit card at a XXXX grocery store located in XXXX, Texas. I had successfully used my card about a hour before at XXXX located in the same strip mall. In an attempt to pay for my groceries, I swiped my debit card. I was told the transaction was not authorized. Despite the fact, I had well over the amount in the account ( even after the previous XXXX purchase ). The check out person suggested that I try again, which I did. XXXX again, the transaction would not authorize. So, I used a debit card from another bank, which did go through. 
When I called Wells Fargo, to inquire what happened, their explanation was that they were concerned that I had been to XXXX previous to using my card at XXXX. So, without a text to my cell or a call, they blocked my card. In response, I explained how I was at check out with a cart full of groceries, not knowing why the card was blocked. The Wells Fargo rep again, just repeated that it was because I had shopped at XXXX previous. Is this something that they do to all of their customer 's accounts? My husband and I have been Wells Fargo customers since XX/XX/XXXX, why the hyper diligence regarding me using my debit card? 
In addition, before the customer service rep would speak with me, she required me to give my XXXX Wells Fargo credit card identification info! The credit card is not linked to the debit card 's checking account. It is an entirely separate account. She asked for this info even after I gave her the identification info regarding the debit card account, as well as the last XXXX digits of my social security number. 
Should I assume that for some reason I was deemed a person of suspicion? How do I know if and when my card will be subjectively blocked? I understand Wells Fargo, like many banks, take fraud related measures to protect accounts, but if Wells Fargo wish for its customers not to shop at XXXX using their debit card, they need to make a public statement. Otherwise, they position themselves as having final say as to where I can spend MY money. 
I would really appreciate an explanation as to their reasoning and if this type of action is within their legal rights. 
