made of synthetic resin is used for a protective layer for protecting the information displayed on the facsimile recording paper 7 a film made of another material such as a synthetic resin layer formed of the above described ethylene vinyl acetate copolymer resin can be used in short it is only necessary that materials which are capable of protecting the information displayed on information recording paper and by which the information can be seen from outside be used in the above described embodiment since the synthetic resin layer 2a formed of an ethylene vinyl acetate copolymer resin is provided between the sheet base 1 and the film 4 a notable advantage in that an excellent bonding force by which the film 4 is bonded to the side of the paper made sheet base 1 can be obtained however the provision of such a synthetic resin layer 2a is not an indispensable condition for the present invention in the above described embodiment because the weak bonding agent 3 and the strong bonding agent 5 are respectively provided between the synthetic resin layer 2a and the film 4 and between the synthetic resin layer 2b and the film 4 the sheet base 1 is caused to peel away from the film 4 and the film 4 is moved to the side of the facsimile recording paper 7 and adhered thereto the provision of such a weak bonding agent 3 and a strong bonding agent 5 is not an indispensable condition in short it is only necessary that the concealment sheet 6 be formed in such a way that after the concealment sheet 6 is adhered to the side of the facsimile recording paper 7 the sheet base 1 is peeled away.