Preliminary Knight's Cross award certificate (Vorläufiges Besitzzeugnis) in two versions - early and late war. Early war is in "fraktur" font. Early certificates patter was shared between all branches. Later in war the patterns drifted apart. All 3 branches are available at Krause Papierwerke -
Luftwaffe (Airforce),
Heer/Waffen-SS (Army) and
Kriegsmarine (Navy). 
Personalized version comes with any desired name, rank, unit and award date. Signed and signed appropriately to period and type. 
 
Perfectly accurate reproduction printed on appropriate thickness cardstock. Consider adding aged paper for great display value. 
 
Consider getting an official version of the certificate for completness of the collection!