Can I still collect on an unpaid invoice if the client's company has dissolved?

This is harder than collecting from an active business, but it isn't automatically hopeless. A dissolved California business entity can still legally be sued even after dissolution, and distributions of money or assets that were made to the company's members while creditors like you remained unpaid may potentially be recoverable from those individual members.

If it appears that a single member essentially drained the company's account and then dissolved it specifically to avoid paying creditors, that pattern raises what's called an alter ego argument, essentially asking a court to disregard the separate legal existence of the entity and hold the individual personally responsible. This kind of argument is genuinely worth actual legal advice rather than relying on a standard document-preparation form, since it requires building a fact-specific case rather than following a routine filing process.