The Do Not Use Ladder 8286 Sign has the symbol on the top and the written words on the bottom. The sign will advise people that they are not allowed to use a ladder, that may be present in a certain area. It may not be safe for them to do so, or the ladder may be required for another essential use.
You should not presume that people will be aware of this instruction, unless you display this sign to inform them.
Fixing requires anything as simple as sticky pads, 'No-nails' type adhesive or double-sided tape.