Tamper-evident Seal can generally be divided into three categories: full transfer, partial transfer, and non-residue. Both full transfer and partial transfer labels will leave traces on the surface of the item when removed, indicating that it has been tampered with. In contrast, non-residue labels will only show signs of tampering on the label itself and will not leave any residue on the item. Non-residue labels can also be used for "No Photography" stickers, applied to visitor’s phone cameras to prevent unauthorized photography in restricted areas.