Your Deals Can Trump No-Amendment Language
Many companies use contracts stating that all changes must be in writing. (If yours don’t say so, have a lawyer review your contract forms now.) The provision alone, however, is not enough. The law in many states provides that a course of dealings between parties will trump a provision that says contracts may only be changed in a signed amendment. This can lead to expensive disputes about whether the work to be provided under the contract or any amendment was really part of the services included in the price.