In the recently added Port Out PIN feature the support article (https://help.documo.com/hc/en-us/articles/29201488079643-Port-Out-PINs) states "You are unable to delete or edit a PIN" without explaining why that is so.
Please make it possible to delete a PIN. I don't see any benefit to force us to leave the PIN there once created (while in general not forcing to have a PIN for every number, which is a good choice made.)
This is useful for managing/monitoring/viewing authorized/expected port outs, and only they are left there.