Cursed or unlucky wishes for scrolls, potions, or spellbooks may give you the blank counterpart instead of what you wanted.

Remove the “unlabeled scroll” description. All roles recognize the scroll of blank paper for what it is.

Dropping a scroll onto a fountain usually or always blanks it.

Dipping a blank scroll or spellbook into a potion of gain ability turns it into some random scroll or spellbook. The beatitude of the resulting object uses the same formula as magic markers. Could also do this for wands of nothing, which become some random wand, without changing their charge count.

Reduce the base price of the scroll of blank paper to something low and unique. It should probably cost less than the scroll of identify, but not be incredibly cheap.

Special room “ruined church” that contains ghosts, pieces of glass scattered around the floor, maybe an altar, maybe a spellbook, and blank paper/scrolls of junk mail scattered around the floor.