This is one of the advantages that prepaid cards have over cash. If you lose your card that’s loaded with funds, your funds will still be available to you. You will need to contact your card issuer and let them know that your card has been lost/stolen/damaged, and request a replacement. You will receive a different card number and PIN, so only your new card can be used, and the balance you had on the lost card will be available to you. Most cards will charge a replacement fee, and this fee differs from card to card. Some prepaid debit cards can be replaced without a fee, but this depends entirely on the card you choose.