Yes. A contract doesn't even need to be written. You can have implied contracts that are still binding. For instance, there's no written contract when you get y

Yes. A contract doesn't even need to be written. You can have implied contracts that are still binding. For instance, there's no written contract when you get your hair cut, but if you tried to refuse payment, you'd have breached your contract. http://dictionary.law.com/Default.aspx?selected=905 http://dictionary.law.com/Default.aspx?selected=905 The employer is still free to fire you (employers can almost always fire someone for any non-protected reason) if they discover and don't like the changes. But even the erasure is indication that you didn't accept the offer as they originally formulated it. People REALLY need to remember that the law is (or tries to be) pragmatic. "Magic bullets" rarely/never exist. You couldn't sneak in a clause saying "I get a 100% pay increase annually" -- in this case, they're the party being bound so would need some indication of assent beyond just a paycheck.