...
Below is a sample of a plastic label holder that had a self-adhesive label stuck to the outside of it, thus making it useless. In this example, an additional label (not pictured) had also been stapled over the label holder and the self-adhesive label. Since the legs of the staple cannot be bent in, they protrude sharply into the box, endangering materials and human hands. Staples should not be used to affix box labels. Label holders are meant to facilitate temporary labeling and future changing of label information during end-processing and for updates. But if a temporary removable label is used by the cataloger, it should be placed directly on the box, rather than the plastic label holder, as these removable labels also tend to stick to the plastic and are hard to remove.
...