If you don't want to receive notifications asking you to validate your auto-posts, this article explains how to deactivate them, so that the auto-posting process is completely automated.
This can only be done from the desktop site.
- Click the 'My Account' cog on the bottom left corner of any page, and go to 'Settings' --> 'Platform'
- On the third row you'll find the option to 'Validate automatic posts via mobile application':
3. Click 'No'
4. Don't forget to hit 'Save' in the bottom right!
From now on your auto-posts will be posted completely automatically, without any further action being required from you.
Note: if you disable post validation, this will only apply to automatic posts you created after changing the setting. You will still need to validate posts created prior to the change.