When a Merge or Deletion requests was filed, accepting it through the Requests interface results in a "has been accepted" notification email, e.g.

Request #9935 has been accepted by Alad [1].

[1] https://aur.archlinux.org/account/Alad/

However, when doing the same for an Orphan request, an "automatically accepted" notification appears instead, as if the package was disowned manually, e.g.

Request #9828 has been accepted automatically by the Arch User
Repository package request system:

The user Alad disowned the package.

I believe in all three cases, an "has been accepted" notification should appear, to ensure users corollate the Disown with the respective request.