The claims are handled according to your state's version of the Uniform Commercial Code. In the model form, there is no prescribed time limt for honoring a claim. Consequently, the bank against which you have a claim does not have a time limit, either. If your customer feels the claim is taking too long, or if you feel that the BOFD is taking too long. Either of you would have the right to file suit for breach of warranty under the UCC. Knowing how fast the court system moves, and how expensive it could be over a dollar amount that may only be in the hundreds, it's usually a better idea to just wait it out.
I can do all things through Him who gives me strength. (Phillipians 4:13)