External contacts
Not everything you assign is handled by someone on your team. "The accountant closes the books by Friday", "the supplier delivers by Wednesday" — it is work with a deadline you want on the map, but the person has no account in your killBottleneck and does not need one.
That is exactly what external contacts are for: a directory of people outside the system who can be assigned a goal or a task with a deadline.
The key thing: an external contact NEVER receives anything
A contact is purely your internal record. They get no e-mails, notifications or invitations, and they do not know about their entry. The e-mail on a contact is just a note for you — the system never sends anything to it. You watch the deadlines: an overdue external item is announced to you as the assigner ("External people have 1 item past due").
Creating a contact
Create contacts right from the assignee picker — open Responsible person in a goal's detail and choose + New external contact… A name is enough ("Accountant — Ms. Smith", "Window supplier XY"); the note and e-mail are optional. The same place manages the directory (Manage contacts…).
Contacts are visible to the whole organization — your company has one accountant, there is no point creating her five times. The exception is a private contact (a switch when creating): only you can see and use it, for personal projects. On a shared map others see just an anonymous "External contact" without the name — privacy wins.
Working with external items
A goal assigned to an external contact behaves like any other: it has a deadline, shows up on the map and in the task table, and most importantly it appears in "Assigned" — in My map you can group it "by people" and see at a glance what sits with whom. The Tasks page can filter by a specific contact.
If you assigned the work by e-mail, attach a link to the sent message to the goal as a link attachment — a Gmail link gets an envelope icon and one click takes you back to the assignment.
Renaming and deleting
The contact's name lives only in the directory — renaming shows everywhere immediately. Deleting a contact breaks nothing: assigned goals and tasks stay, they just show "External contact" instead of the name.