Abstract: A method of associating a first party and a second party is provided, the method comprising receiving a first electronic message comprising information indicative of the first party; generating a first electronic token in response to receiving the information indicative of the first party; sending the first electronic token to the first party; receiving one or more second electronic messages from the second party, the one or more second electronic messages comprising the first electronic token and information indicative of the second party; generating a second electronic token in response to receiving the first electronic token and the information indicative of the second party from the second party; associating the information indicative of the first party, the second party and the second electronic token, the first party being identified on the basis of the first electronic token, and sending the second electronic token to the first party.