Well for one, I wouldn't force the hand in regards to the contract, that will just create bad blood. I would first take a deep look at what you were hired to do. Yes it's true, there cannot be more than one submitter ID..it's not good practice anyway for you to bill while another is also billing. If you were hired to just do clean up, that's what I would do. Anything needed to be re-billed should be sent back to the office/biller for rebilling. Work only on accounts that can be cleaned up w/out needing to be rebilled. Software shouldn't be an issue, if you didn't sign on for billing, you could get away with working off reports and/or using spread sheets. Again, I really wouldn't push the issue with software and examine only the duties for which you signed on for.