By now, very well-made counterfeit Montblanc refills also exist, so the previously common statement that original refills only fit into original pens is no longer reliable. With some editions, e.g. Bohème rollerballs, original and counterfeit can hardly be distinguished from photos alone. Only an assessment at a specialist retailer on the spot brings certainty, where the refills can also be obtained as originals. Service guide, original packaging and a specialist retailer's stamp increase the probability of an original.