My father recently had surgery and had asked that I go to Costco to pick some things up for him while we were in Twin Falls. With his card in hand, the card registered to the same address as my driver's license, the cashier refused to check us out. She stated that he would need to come in to the store, so after explaining and giving him a call to provide permission, she then advised me that I would not be allowed to pay for the items because the debit card was not under his name. My girlfriend who was with me, offered the cashier her card which she frequently uses, and after ringing out the items would not allow her to use my card which we hold as a joint account. She even went so far as to refuse the cash offered to her because it came out of my purse. As to why this woman was so rude and insulting towards us, I do not know. Even if it was that she was having a bad day, she was completely unprofessional in the way she treated us. The scene she caused greatly humiliated myself and my girlfriend, leaving me in tears. After paying for our items so we could get away from this woman, she then took the next step and refused to return my father's card to me. My father again, who had just had surgery, had to make the trip to Costco just to retrieve his card from this ill-mannered woman. In reality, the only reason I could find that this woman was so uncivil towards us was because we are a lesbian couple. I understand that not everyone is accepting of our lifestyle, but the utter disregard that this woman held for us, and the lack of respect we were shown at your company was uncalled for. At this time I do not know what a sufficient resolution to this complaint would be, or if there is one for that matter. What I do know is that I will no longer be frequenting your establishment if this is how we are to be treated as patrons.