I inherited some land from my grandmother.   After examining her paperwork on this property, I noticed a right-of-way easement was given to an oil company for a high pressure gas pipeline.  Her signed documentation contains no terms or conditions.  Yet, a copy of the company's documentation shows a term for 50 years with a handwritten modification for an option for another 50 years.  I believe this contract for this easement is illegal and was never void.  There are no initials verifying my grandmother was aware of this change.  I am trying to find a law which states the legalities of an unsanctioned modification and that this contract is breached.  Thank you. 