DO NOT buy any shop cards online. They are very easily stolen now as of March 1st.
I bought some shop cards on Feb 29th and it was the normal emailed link to access the card number and pin as it has been for a long time, but on March 1st I bought more cards and they changed the system. It takes you to a website with a text box to fill in a 10 digit code. The code is automatically entered for you, but anyone could just be running a program to get any non used shop cards by randomly entering codes. I have played with it and there is zero spam protection, you can enter as many codes as you want.
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All the cards I bought on the 1st have been stolen, a total of $2k. They were all used in store 1070 in NY and I am in Denver. Who ever did steal them was smart to use tem in store as you don't need a membership or anything to tie they cards to you. I am currently on the phone with Costco and it does not seem like they are willing to do a much. I'll update if anything does happen.
UPDATE: I was told I would hear back today, but I have not. I was going to give Costco a chance to fix it before contacting my CC and state about it. I was really hoping with Costco’s normally great customer service they would have done something by now. Guess I will try again tomorrow and if nothing else get my CC refunded.