"Luxury" seals or stamps that reach a
certain value must always be accompanied by a certificate guaranteeing
its perfect state of preservation and authenticity.
LUIS DEL TARRE, an expert on stamps of Spain is a member of COMEX (Committee
of experts in PHILATELY) where through an exhaustive study verifies and certifies the authenticity of the stamps accompanied by a certificate
PHILATELY LUIS DEL TARRE recommended that certain philatelic stamps from a private collection should be analyzed to ensure it's authenticity and for guarantee it's owner that it is an authentic
and well-preserved stamp.