When a lawyer-client relationship implodes, the lawyer is usually left with unpaid fees. And since Rule 1.16 of the Illinois Rules of Professional Conduct requires a fired (or firing) lawyer to return all client papers and property, the lawyer owed the fees often has no leverage to secure payment. Enter the common-law retaining lien. It allows the lawyer to hold, or retain, his or her client’s papers until the client pays up. It’s a possessory or “passive lien,” meaning that the lawyer perfects …