Abstract: A lottery ticket is described having a front sheet which defines a plurality of windows and includes a plurality of bars separating said windows from one another and a plurality of closure panels closing the windows, a rear sheet and an intermediate layer for selectively bonding the front sheet and the rear sheet together. The side of the rear sheet which faces the front sheet bears a plurality of game symbols arranged in sets of symbols, with each set of symbols located within a respective window and including a set of winning symbols located in a winning window. The lottery ticket incorporates a first security indicia which comprises the occurrence in a set of winning symbols of all but one symbol of a uniform size and one symbol of a visibly larger or smaller size. This security indicia may be used alone or in combination with a second security indicia, for example, a printed word indicating that the ticket is a winning ticket.