There is the legal answer and the practical one. Legally, you can file a lawsuit against the client: he or she is legally obligated to pay you for your services. If there is any money there, then even if the conservator would rather spend it on something else, you can get a judgment ordering the conservator to pay you out of the client's money.That brings up the practical issue: since the conservator is not personally liable for pay, you will only collect money if the client has some: a court judgment does not make money appear where there is none. So if the client is truly insolvent, even if you sue and win, you will not be paid.