You can. To prevent deletion of invoices, you'll need to create a role which lists all of the archetypes which may be deleted, with the exception of invoices.

1. Go to Administration -> Authorities. Click New. Fill out the New Authority as follows:

• Authority Name: Remove Customer Account Item
• Service Name: Archetype Service
• Method Name: remove
• Archetype Name: act.customerAccount*Item

This creates an Authority which gives permission to remove all archetypes matching act.customerAccount*Item

This matches:

• act.customerAccountInvoiceItem (i.e. Customer Invoice Item)
• act.customerAccountCounterItem (i.e. Customer Counter Sale Item)
• act.customerAccountCreditItem (i.e. Customer Credit Item)

2. Click OK to save the Authority

3. Go to Administration -> Roles. Click New. Fill out the New Role as follows:

• Name: Simple Remove Role
• Add the following Authorities
  • "Remove Customer Account Item"
  • "Save. All"
  • "Create. All"

This creates a Role which can create and save all archetypes, but only remove customer account items

4. Click OK to save the Role

5. Assign the Role to a user

Go to Administration -> Users, and edit a user.

Remove any existing role, and add the new "Simple Remove Role"

Regards,
 

Tim