Sticky notes yellow. Post-it® sticky notes are indispensable helpers for organisation of your work and communication in the office. They adhere perfectly to paper and smooth surfaces and thanks to the unique Post-it® adhesive technology can be removed from the surface at any time without leaving any residue and repositioned. Sticky notes yellow. Post-it® sticky notes are indispensable helpers for organisation of your work and communication in the office. They adhere perfectly to paper and smooth surfaces and thanks to the unique Post-it® adhesive technology can be removed from the surface at any time without leaving any residue and repositioned.