My question involves labor and employment law for the state of: OK (non-union) not federal. I work shift work and our schedule is posted bi-monthly. I was aware of our two week schedule and was not working any above my currently assigned shift. While I am on off days, an employee changes the scheduled which reflects me working one day of my off days. I was not informed by phone, sms, email, fax or carrier pigeon. So I was not made aware of this change. I get a phone call the day of said schedule change. Supervisor asking why I am not at work! I explain I was not aware I was on schedule. Supervisor spoke to person taking day off and he/she said we spoke face to face about the change. This face to face statement is an absolute fabrication and I was not aware of change. When I return on my next scheduled shift; Supervisor states I'm lying and wants me to sign a disciplinary action form. I showed him\her the timestamp on SharePoint of when the last edit to our schedule was made indicating the schedule was changed while I was on off time, then the schedule I saw was removed and replaced on the corkboard and the edited schedule was then posted. Supervisor insist I sign this disciplinary form because I am lying. I didn't sign and after 2 hours of his/her interrogation style conference ending with me not signing the form and supervisors derogatory statement that I lied.

