Abstract: A computer-implemented method for facilitating payment of a total amount comprising multiple future instalments by a customer (3), the method comprising: receiving, at an instalment payment server (5), an indication from a mobile device (7) associated with the customer (3) to set up the payment by the multiple future instalments; generating first authorisation data indicative of an authorisation of the multiple future instalments; sending the first authorisation data to a mobile device (7). The method may include displaying on the mobile device (7) an optical machine readable representation of the first authorisation data; and scanning, by a merchant POS system (13) associated with a merchant (11), the optical machine readable representation of the first authorisation data from the mobile device (7).