In accordance with an embodiment of the invention, a method for creating a
self-authenticating document is disclosed. The method comprises:
providing a base substrate forming the document; printing an
authentication seal on the document, the authentication seal comprising a
printed portion comprising an ink creating a bleed area on the document
where the ink and the substrate interact; and obtaining unique bleed
properties of the bleed area. The bleed properties are obtained by
scanning the bleed area upon termination of bleeding or drying to provide
a description of the ink and substrate interaction to generate an
identifier code representing the unique bleed properties. The method
further comprises generating a signature of the identifier code, encoding
the identifier code in an information carrier, and associating the
information carrier with the document or storing the signed identifier
code in a remote verification seal code that is not printed on the
document. The authentication seal is capable of being scanned and
compared to the information carrier or to the remote verification seal
code, wherein the verification seal code is not located on the document
and comprises the same code information as the identifier code.