The article offers a detailed interpretation of the private letter P.Oxy. 43/3094. This letter deals with a lawsuit which was carried on before three governors (M. Aurelius Septimius Heraclitus, L. Valerius Datu and Iulius Basilianus). A chronological reconciliation with the events and implications of Caracalla’s journey to Alexandria in the winter of 215/16 AD enables a detailed reconstruction of the course of the lawsuit, which lasted approximately three years. Furthermore the paper discusses the meaning of ὑπόμνημα in a juridical and administrative context.