According to rules of English grammar, proper nouns should be written with the first letter in upper case. An example is: the Coca Cola Company.
If I choose to refer to the Coca Cola Company in a sentence simply as "the Company", should the letter "C" be upper or lower case?
Any reference to grammar guidelines would be very much appreciated.
In contracts it is common to use a capital letter when the common noun is used as a replacement for a proper noun. "On the first of each month Tenant will pay to Landlord..." In prose writing this is not the case. "Coca Cola made a mistake when the company decided to change its formula."