Pixel-accurate reproduction of War Merit Medal award certificate.
It was an A4-sized document with embossed seal issued by Presidenial Office (the seal that's embossed in originals is printed in reproduction; it looks very convincing though - see pictures)
 
Document can also be personalized (filled out on a German period typewriter)
 
There are 2 variants available:
early-war edition (August 1940 till ~end of 1943)
late-war edition (from 1944)
 
More items related to  War Merit Awards are here.