Re: Employer Trying to Change the Terms of a Termination Agreement
You will have to determine if this letter is a contract or simply a letter of notification. If a contract, if you cannot negotiate an acceptable solution, your only avenue would be to sue for your losses.
If it was simply a letter of notification, then as such, the employer would have the right and ability to alter the terms at their discretion.
It sounds like it was simply a notification. As such, there is no contractual requirement for the former employer to act as promised. If you incurred damages due to some action you took based on their promise, you might have a claim for those damages. If there were no damages due to them changing the terms of the letter, then you would have no claim.
In other words: just because the said they were going to give you something does not mean they have to follow through with that promise. It was a gratuitous act, not mandatory. As such, they can revoke their offer of gratuity unless you took some action based on their gift that caused you damages.
I am not an attorney and any advice is not to be construed as legal advice. You might even want to ignore my advice. Actually, there are plenty of real attorneys that you might want to ignore as well.