A friend of mine was hired by a company that has a lengthy onboarding process that has lots of paper work. One document he had to sign contained
The following are Developments not covered by Paragraph 5, in which I have any right, title, or interest, and which were previously conceived or written either wholly or in part by me, but neither published nor filed in any Patent Office:
Description of Documents (if applicable):...... Title on Document.......Date on Document....Name of Witness on Document
After they filled it out and sent it to head office they believed they filled it out wrong. Under the description they put “personal projects”, as well as writing “none” on another line. Since the instructions say not to do this and “personal projects” probably isn’t what they were looking for, this contract was filled out wrong.
This is just an example but in general what happens when something legally binding is filled out wrong? Does it invalidate the whole thing?