Learn how Netspend's prepaid debit cards work. Order a card for free, activate it, & use it anywhere Visa & MasterCard are accepted. Netspend is a leading provider of FDIC-insured Visa ® Prepaid and Prepaid Mastercard ® and corporate prepaid card solutions in the United States. Learn how a Western Union NetSpend Prepaid MasterCard works. Order a card online at no cost, activate it and use it anywhere MasterCard is accepted.