If the company was a corporation and was dissolved, he could only collect if the accounts receivable had been sold or transferred (e.g "assigned") to him formally (and so with proof of this having been done) by the corporation prior to its dissolution--that is, when it was still in existence to transfer the right to collect. If that was not done, then it is too late to transfer the accounts receivable to him now, and since the corporation is dissolved, it cannot collect--so without a prior transfer of the the right to collect, he cannot collect.If the right to the accounts receivable was transferred to him properly, then he would file any claims under his own name.