Hi there @Karen_Jaffe! Sorry again for the trouble you’ve been having here.
Generally when you’re in the process of drafting a task, I’d recommend either simply assigning it to yourself or creating it in a private project that you access whenever you need it, and then once the task is ready to go, you can unassign it from yourself (or remove it from the private project) and then assign it to the person’s correct email address. Just to be clear as well, the task will automatically save so there’s no need to add a dummy address as the progress you’ve made won’t be lost. When you enter an address in the Assignee or Follower field of a task and they are not already a Member/Guest of your Workspace/Organization, an invite is sent to that address inviting them to join the space with you.
If you would like to you remove these dummy email addresses, you can do so easily by accessing the Admin Console, navigating to the Members tab and hovering over these email addresses (they’ll be listed as pending invitations) and removing them - https://asana.com/guide/help/premium/admin-console#gl-members
Once you’ve done that, you can then make whatever adjustments to these tasks you’d like and once they’re ready, you can assign them to the real people.
If you have any follow-up questions here or if you’re still unsure, please let me know! I’ll be happy to assist you further!