Isn’t a UV pen just as effective?
UV pens simply leave a mark on property and as such the property can’t be tracked back to its rightful owner. They are not therefore a secure solution for marking property. Also UV pens need a suitable surface area on which to write your details, such as a postcode, which is not practical for smaller items or jewellery. Also there is nothing to stop a thief from marking over the top of any identifying marks with another UV pen and obscuring the original markings.
