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I am sorry to hear about this situation. On this website, I do not always get to give good news, and this is one of these times.
An employer generally has the right to terminate or to write up an employee FOR ANY REASON.
The only reasons they cannot do this for are:
-PUBLIC POLICY (discrimination based on race, religion, creed, etc; or, a retaliatory termination due to a claim made by an employee); or
-CONTRACT POLICY (if one has a contract that disallows such a termination)
-COVENANT OF GOOD FAITH (firing an employee to avoid paying a benefit, for example)
Otherwise, an employer can terminate or write up an employee for any reason, without notice. It can be based on a mistaken rumor, or, just the fact that they do not like your shoes one day. You will hear "right to work" a lot. However, that does not mean what people think it means. All this means is that at time of being employed, the employee has a choice whether or not to join a union as a condition of employment. And the same applies to non-profit as well.
As such, while what the employer did was not fair, it was not unlawful. You cannot demand to have the write up "stricken," for example.
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