The answer here really depends on your sales contract. Typically, most people who offer seller financing have their borrowers submit their payments directly to the business, because the business that sold those assets is the legal entity that has a right to enforce that contract. The major complaint to this strategy is that you must keep your legal entity going even after you’ve sold all the assets. However, this is done all the time.
You don’t want to have a borrower that is behind in payments change who they are making payments to. This could not only mess up borrow in the future, but it could also mess up your contract and make it more difficult to get paid in the future. You could also be violating your contract if you try to do something like this. You’ll need to read through your financing agreement and fully understand what it says before you can know what to do though.