Attachment is a mandatory field in National ID portlet. However, National ID records can be saved without any attachment.
Employee Central: New People Profile (PP3)
Making attachment field mandatory works fine in Newhire, Creation/Correction/Insert new record (JobInfo).
This does not work in Grid elements ex: National ID portlet, Email Information portlet, Phone Information portlet, Compensation Information portlet (Pay Component Recurring), Spot Bonus portlet (Pay Component Non-recurring), etc.
The engineering team is aware of this issue. They are trying to fix it in b1711 release. If you continue to face the issue after b1711 release, please contact Cloud Product Support.
compulsory_field , KBA , LOD-SF-EC-PP3 , People Profile 3 , LOD-SF-EC , Employee Central , Bug Filed