In New Testament scholarship, the pseudonymity of the so-called Pastoral Epistles (1–2 Timothy and Titus) continues to be a majority position, partially because many scholars assume that they were originally designed as a tripartite letter corpus. Over the past decades, however, a growing group of scholars has started to challenge this corpus theory by pointing out the individual qualities of the letters to Timothy and Titus and their mutual differences. These research findings have brought a number of scholars to believe that the letters were composed by more than one author. When the arguments for plural authorship are compared to the traditional arguments for common authorship, it seems the pseudonymity of the Pastoral Epistles is by no means a foregone conclusion. Accordingly, the quest for the origin(s) of the letters to Timothy and Titus must be continued.