Most people are not well aware of the basics of a complimentary slip. It is a simple piece of paper that contains information about your company. It is designed in a similar manner as that of a letterhead, using the company’s branding colours. The purpose of complimentary slips is quite different though. Unlike other components of branding, a complimentary slip is used for informal responses or letters. For instance, if you want to scribble down a price list, then instead of using any ordinary paper to write on, you can use a complimentary paper.