<prompt> Human: Ive never dealt with anything like this before and really at a loss as to how to go about it. I am not sure if this should be considered a predominantly legal issue, if so I will post elsewhere. After a painstakingly long on-boarding processes, I finally got hired as a Per Diem at a hospital where I did my internship 2 years ago. I dont want to give identifiers but just for context as to how big this organization is, this is one of the UCs. When I finally received an offer letter from them about 3 weeks ago, I was thrilled to see that it was for 46.30 per hour. Then, after doing trainings and endless pre-employment screenings, they sent me an email stating: Attached is your revised offer letter with the corrected rate which had been mistaken for another position on your offer letter.For further questions you can call phone for clarification.Please sign.This was last Wednesday, 2 weeks after I had received the initial letter. This new offer letter has an hourly rate of 36.09 per hour. Still a decent pay rate, but wow, thats a really big mistake to leave me hanging on for two weeks. Keep in mind this is Per Diem, so I will get 2-3 shifts per month and no benefits.Fortunately some of my colleagues have my back since they know me from internship. They informed me that this has been an ongoing problem and that they have been demanding a pay raise for Per Diems and the whole department for a long time with no results. They even contacted the Union, who got back to them with good news, but then retracted that news, saying, we confused the position that did get a raise with your job description. So there is this pattern emerging, our job description is almost identical to another position which gets paid significantly more...At this point, I have not yet signed the revised offer letter. They have sent me multiple email reminders stating the same thing, verbatim, but have not called or attempted any other contactclarification. In the meantime I called the union to see what can be done, they have not gotten back to me yet. So, with this context, I have two questions:1 Should I push for the original offer, am I at risk for having the offer pulled if I do so?2 Having signed the original offer and NOT the revised offer and the pay period closing today, do they have to pay me at the original rate?And again, if these are not appropriate for this subreddit please let me know and I will post elsewhere.UPDATE: Thanks for all the comments, advice, perspectives, etc. And apologies for not responding. I finally got a call back from the union representative, who basically said: I could possibly make a case for this if I hire expensive lawyers and follow through a big dramatic process. But, as a Per Diem, I have less rights than other workers, therefore my case would be weak... If I were you I would remain quiet and subservient and maybe bring it up in bargaining later this year. So, I signed the revised letter, as many as you correctly pointed out, this lower wage was actually what I was expecting to get. But the fact still remains that there has apparently been a trend of my departments job description being so similar to the point of getting confused with another job title which gets paid much more. This seems to be an indicator that we myself and others with the same position are being underpaid overall. So I guess well bring it up in bargaining and hope this could be a part of the argument that my colleagues have been trying to make for many years.Oh, lovely bureaucracy. I feel welcomed to the big leagues. Assistant: In theory the original agreement may be enforceable particularly for the hours youve already worked but in practice the hospital has a number of options to get out of it, the easiest being to simply stop adding you to the schedule. If you want to continue working for them you will probably have to live with the revised pay rate or at least negotiate with them in good faith.Sorry. That sucks.Human: point taken, but again, the person who actually writes the schedule is someone I know personally and has every reason to be on my side if i get higher pay the whole department has to. The person pushing the new offer letter does not have anything to do with the schedule and I will probably never even see hisher face. But they could maybe try to pull the offer all together, but I dont think that is in the power of any one person alone. Once again, I have to emphasize, this is the University of California system. Its frickin massive.  <response>: Thats good that you have people on your side, but I dont think its practical to believe that UC will indefinitely continue to employ you and pay you at the higher rate simply because you failed to sign and return the revised offer letter and your supervisor continued putting you on the schedule. Being that its a larger organization may buy you some time but at some point the rubber will meet the road and you will be faced with a decision. 