To get power of attorney or letter of succession in Kenya, you can consult a lawyer who will guide you through the process. The Law of Succession Act in Kenya provides for the administration of estates of deceased persons, and the procedure for obtaining letters of administration or probate. The Deputy Registrar shall open a file and place the file before a Judge who shall then issue an order for the succession matter to be advertised in the Kenya Gazette. If no objections are raised within 30 days of the gazettement, letters of grant of probate shall be issued by the Court.

I hope that helps.