the invention relates to : a method of providing an electronically readable item of information on a medication cartridge . the invention further relates to a cartridge containing an electronically readable item of information , a support for reading the information on the cartridge , a medication delivery device adapted to use a cartridge and a support according to the invention and a label containing an electronically readable item of information . the object of the present invention is to provide an alternative method of generating an electronically readable item of information on a cartridge which method is simple and improves safety in reading . the problem is solved in that said item of information is redundantly provided . the invention may e . g . be used in connection with medication delivery devices for self - treatment of a disease , e . g . diabetes .