Letterhead refers to the name and address of a person a company or an institution printed as a heading on stationery Address includes postcode and telephone number optionally fax number. e-mail address. website address. and telex number. Sometimes the letterhead also includes a logo• Letterhead refers to the name and address of a person, a company or an institution printed as a heading on stationery. Address includes postcode and telephone number, optionally, fax number, e-mail address, website address, and telex number. Sometimes the letterhead also includes a logo