1. A method for securing an opaque or translucent, colored or colorless object, the method comprising: bonding a label via to the object, wherein the label comprises: a substrate comprising a watermark or pseudo-watermark having a transparency sufficient to permit observation of the object through the watermark or pseudo-watermark; and a luminescent agent superposed at least partially on the watermark or pseudo-watermark and located between the watermark or pseudo-watermark and the object.