There are four things you should never say to an insurance adjuster. 1. Don't ever talk about fault. 2. Don't talk about your prior medical history.  3. Do not talk about how much insurance you have. 4. Do not agree to be tape recorded. They will use any of these mistakes against you. They may even come back and tell you that the accident was your fault and so they won't pay a dime. They will tell you that your previous injuries aren't their responsibility and you'll have a hard time arguing the extent of the exacerbation on your own. Or they'll try to kick the responsibility back onto your insurance company, which could get you into a fight with two companies or even raise your rates.