B-1, r. 3.1 - Code of Professional Conduct of Lawyers
52. A lawyer who ceases to act for a client must take the necessary conservatory measures to spare the client serious and foreseeable prejudice. In particular, the lawyer must:
(1) promptly deliver to him all documents and property to which he is entitled;
(2) give him all the information he has with respect to the mandate;
(3) account to him for all funds he held or holds in trust, including the refund of any advance;
(4) promptly inform him about his unpaid fees and disbursements; and
(5) make all reasonable efforts to facilitate the transfer of his file to the lawyer succeeding him and cooperate with the successor lawyer for that purpose.