Boy, I feel for you. Happened to me back in 83, Did an $80,000 job. Ins. Co pre payed us 30,000 for materials, 50,000 check cut on completion,
Went to pick up our check and ins co said The homeowner picked it up a couple hours before. Yes our name was also on the check,
We had payroll and other bills pending on the deposit of that check.
Homeowner picked it up, went to her bank (which also was ours) signed her and our name to the back and deposited it to her account.
She left for Vegas and we couldn't find her for 3 days, by then it was to late, it was all gone.
I got lucky, I went after my bank, My lawyer call them and they, after a little hesitation and seeing our invoice, cut us our check. It was their fault, they knew all our checks were rubber stamped, they had our account for years.
The bank got their money back, the lady's husband died 3 months prior to the flooding and his ins. policy had the coverage to make the house free and clear. they just had her sign a new lien or go to jail for forgery. She ended up losing the house later anyways with her gambling problem.
Hope it all works out for you..