Some sellers deliberately mix originals (e.g. a Mozart, a Montblanc 24 or a green etui) with counterfeits in order to appear reputable. Conspicuous features for fakes are forged packaging, wrong proportions (rollerballs often have to have a larger diameter) and implausible model variants. Notes to the sellers usually have no consequence; Montblanc itself, however, gratefully receives such reports. Buyers are advised to consistently compare with the fake overviews on Fountainpen.de before bidding.