A method is provided for supplying marking material. A package containing the marking material and having an information-bearing tag is fed into a housing of a printing machine along a path including a package inlet. The tag is read to verify the marking material contained in the package. The package is then opened at least partially within the housing to expel the marking material from the package. Objects being marked move relative to the printing machine along a different path not including the package inlet. A method also is provided for verifying the contents of a collapsible marking material package. The package is fed into the housing of the printing machine, and an information-bearing tag on the package is read. If incorrect material has been inserted, the package then is rejected and ejected from the housing before it has been collapsed.