online activation of the walmart money card is an easy and secure process the mechanism is a part of authentication process that tells walmart that the new card issued is now in the hands of legitimate cardholder the activation takes just a few minutes 1 visit the website www wallmartmoneycard com wallmart orgo to the url https www walmartmoneycard com walmart activation online activation init enter 16 digit temporary card number enter the 3 digit security code written at the back of the cardo to the url https www walmartmoneycard com walmart activation online activation init enter 16 digit temporary card number enter the 3 digit security code written at the back of the card