How do you get stickers off of paper?

I use eucalyptus oil. It dissolves the glue without damaging glossy paper like a book cover,

Using patience, and a razor blade. Watch your fingers! Also, you can use a tiny bit of WD40 on a cloth to get the stickyness off.

Goo Gone

Grab it and rip it off as hard as you can.

A little bit of vegetable, or olive oil on a rag.

I am late with the answer so if none of the above work, try heating with a hair dryer, that works to remove pricing stickers. Or to remove stamps I would put the envelope in the freezer for a while.

Maybe one of those ideas will do the trick for you.