Patent ID: 7980595

Claim:
A postage payment label for evidencing payment of postage comprising: a substrate, said substrate transmitting light of one or more first wavelengths outside of a human visible spectrum of light; said substrate having a first surface and a second surface opposite said first surface; an image provided on said first surface of said substrate, said image being generated using one or more first dyes that transmit said light of one or more first wavelengths and at least one of absorb and reflect light of one or more second wavelengths inside of said human visible spectrum of light; and a postage mark printed as a reverse image on said second surface of said substrate, said postage mark providing evidence of postage payment and being printed with one or more second dyes that either absorb or reflect said light of one or more first wavelengths; wherein said image conceals at least a portion of said postage mark when said image is illuminated substantially by said light of one or more second wavelengths, and wherein said at least a portion of said postage mark is not concealed by said image and may be viewed when said image and said at least a portion of said postage mark are substantially illuminated by said light of one or more first wavelengths.