The contribution is aimed at reassessing the relationship between an edictum by Claudius, documented in D. 48.10.14.2, D. 48.10.15pr., D.48.10.22pr., C. 9.23.3, and a senatus consultum by Nero, mentioned in Svet. Nero 17, both dealing with the insertion of a provision in one's favor into the testament of someone else. The reliability of the information regarding these interventions is examined by taking into account doubts expressed by some scholars thereof and finally, possible reasons for subsequent legislative measures on the same topic are outlined.