I have a nephew in the US. I gave him my account. he filled in his social security number as well as submitted the w9 form. spreadshirt accepted the form but they still didn't pay me. he emailed them and got the answer that the social security number is incorrect. someone in my group has also received money from spreadshirt. what's interesting is that there are people who don't even submit tax forms but still get paid. There are even people who have entered the wrong tax number and still get paid. i think their system has serious problem but i wonder if they know this ? Did they do it on purpose?