The embodiments described herein provide in one aspect, a method of loading a transaction card account onto a mobile device, the mobile device comprising a memory and a contactless reader, the method comprising: reading, via the contactless reader, transaction card information from a physical contactless transaction card corresponding to the transaction card account; sending a retrieval message, to an issuer server, to retrieve a card security credential for the transaction card account, the retrieval message comprising the transaction card information for identifying the transaction card account at the issuer server; receiving, from the issuer server, a card security credential for the transaction card account; and storing, the transaction card information and the card security credential as a transaction card corresponding to the transaction account, on the memory of the mobile device.