Do I have to sign the back of my card?

there is a sentence on the back of the card says that " Not Valid unless signed" 
what is that mean? 
and is that make problems when i withdraw from any ATM 


  • fantasma
    fantasma Payoneero Member Posts: 196 ✭✭

    You have to write your signature in order to make purchases in stores (It's just a security measure). There will be no problem with ATM's if you leave it in blank.

  • abolzook
    abolzook Member Posts: 6

    thanks for help