A cash dye solution is a timed device that permanently stains robbed cash. This makes sure that the cash robbed from a bank is not reusable. Once the robber leaves the premises of the bank, the cash dye is splattered all over the cash by the means of a timed miniature explosive device. The robber can be apprehended as the ink used in the cash dye solution is indelible and not only stains the notes but the hands and clothes of the robber as well. This solution prevents the robber from using the cash robbed in any manner and thus foils the motive of the robbery.