Limit access to delete attachment

How we can restrict access of staff to delete attachment to documents like quote , invoice , supplier quote, purchase invoice … ?
so they only can attach scanned invoice , but they can’t delete .

You can control delete permission on the Role from Role Permission Manager tool.

Setup > Role Permission Manager

  1. Select a Doctype (like Sales Invoice)
  2. For the Roles, ensure no Delete permission is assigned to them.

hi umair
Thanks for reply , i ask about attachment . for example who make sales invoice ,scan and attached signed invoice by customer to sales invoice . i ask how we can limit other user can see this sales invoice to can’t delete attachment.