If you require a removable label the best option is a Prime Coat Removeable label. When removed this label will take all of the adhesive with it.
Many cheaper removable labels on the market are in fact just standard labels with a low grade adhesive. While these can be easily removed in the short term, the longer the label stays applied to the surface, the harder the adhesive will become, making removal increasingly difficult. They can also leave a sticky residue when removed.