Letterhead plays a huge part in a company's brand identity. Everything sent from a company to its clients (letters, publicity folders, envelopes, invoices) must create a cohesive, recognizable corporate identity. The company's logo and address must be repeated on all business marketing material. The goal is for the public to be able to instantly know who the correspondence is from by spotting the logo on the company letterhead. The letterhead is another way to ingrain the company's logo, or image, in the public's mind.