The reader will not process copied decals.
Nothing stops anyone from making a copy, but BAi Readers are precision laser barcode readers that will not process fake decals. That includes but is not limited to -- photocopies, copies on glossy paper, photos on smartphones.
Think of copies like an art forgery, and the BAi Reader as an expert that can test every detail of a painting. We can't stop people from making forgeries, but thus far none have passed the Reader. For a more technical explanation, and to see what the Reader sees here is a short video explanation: