There are a few things you should know before you create a summoning scroll.
If you create a summoning scroll, NPC of the animal must be in five forms.
-Sage Animal
-Head Animal
-Chief Animal
-Medium Animal
-Small Animal
These animals will be summoned based on your mastery. YOU must name and rank each of these in a NPC forum post. This will be your responsibility. IF you want to have a summon you must follow these rules or else it will be denied.