<prompt> Human: Realized I left out several very important facts - I was referred by the person who will be my boss and knows me well to apply for the job, which is being staffed by an agency. I am now dealing directly with the agency.Looking advice for a rollercoaster of a situation. Got a job offer from an agency on behalf of a big reputable company, asked for an amount, got an offer letter for 20hr more than what I asked. Obviously accepted, filled out all the paperwork etc. This was Monday. Got an email today saying they fucked up and can I accept my original offer. I should mention they didnt word it like that - just said there was a miscommunication and a better rate for the position was what I had originally proposed to the actual company not the agency.Already put in my two weeks at my current job. Should I try to negotiate? Told my current job what was in the offer letter originally so they didnt try to counter because it was so high. Im in California so at will employment is a thing.  <response>: Im not sure I follow the offer completely, are you saying that for example a company offered you 10 hour but via the agency that offer changed to 30 hour?I dont know employment law over there but is any of this formally agreed, do they HAVE to know employ you at that salary or can they just simply abandon you and readvertise? You need to make sure that what sound like a mistake on their side doesnt end up with you out of a job.If they are forced to honour their offer, I personally would be concerned they would just fire me at the first opportunity. They arent going to have the budget to continue paying that salary so Id imagine they would cut you off ASAP.Try and use this mistake to get a slightly higher salary than originally offered but I wouldnt play hard ball unless you can cope with unemployment. 