The purpose of this paper is to contribute to the design of e-wallets. e-wallets are intended to replace the existing physical wallet, with its notes, coins, photos, plastic cards, loyalty cards etc. Four different user groups, including teenagers, young adults, mothers and businessmen, has been involved in process of identifying, developing and evaluating functional and design properties of e-wallets. Interviews and formative usability evaluations have provided data for the construction of first a conceptual model in the form of sketches, and later a functional model in the form of low-fidelity mock-ups. During the design phases, knowledge was gained on what properties the test users would like the mobile wallet to hold. The identified properties have been clustered as 'Functionality properties' and 'Design properties' in two tables, which are theoretical contributions to the ongoing research in mobile wallets.