Code of Professional Responsibility and Accountability (CPRA)
Section 23. Instituting multiple cases; forum shopping. - A lawyer shall not knowingly engage or through gross negligence in forum shopping, which offends against the administration of justice, and is a falsehood foisted upon the court, tribunal, or other government agency. A lawyer shall not institute or advise the client to institute multiple cases to gain leverage in a case, to harass a party, to delay the proceedings, or to increase the cost of litigation.