When submitting an invoice to an insurance company or adjuster you need to make sure that it is written in their language and organized the way they want it. By doing this you will be making their job easier and hopefully creating a good relationship with them by being a solution partner for them.
Keep the lines of communication always open and flowing. Make sure that you and the adjuster are on the same page as far as the game plan for handling the loss goes. Each job is different in some way or another. Let the adjuster know you are concerned about his thoughts on the claim as well as what you have determined needs to be done. A quick phone conversation at the beginning of the job can ensure that the adjuster doesn't get hit with any surprises when he sees your invoice.