I bought a ream of Coles A4 Laser paper the other day, I ended up throwing it all in the recycle bin.
The paper isn't fit to be used in a laser document printer. It curls inside like a crinkle cut chip and rubs across the toner cartridge and smudges the whole sheet of paper.
Went to woolworths and bought a ream of Reflex A4 paper and it started printing fine again.