Have you ever bought an item from an antique store or flea market only to get it home and realize that the seller glued a %@*$#+ sticker on the wood or other finish, that will not come off without the threat of ruin? Don’t use alcohol, scrape it or use any abrasive. (shudder) Don’t even pick at it with your finger nail. Instead, grab the salad oil or mineral oil, pour it on a soft cloth and cover the sticker, letting it sit and soak for a while.
If you have already pulled parts of the sticker off, use the cloth, rub the oil into the glue in a circular motion until it softens and rolls off. If the sticker is stuck fast or has been there for a long time and you can afford the time, (and with some stickers you may have to do this anyway) pour either one of the oils directly on the paper and let it sit overnight. The following day it should be soft enough to pull off, glue and all.
While we are on this topic, every collector should have mineral oil around. A small amount of mineral oil works great on removing light scratches from vintage furniture, without stripping the original finish or patina.