Yes you can! Our rules module allows you add multiple rules around invoice approval based on dollar amount of the invoice. To add new rules or modify existing rules, go to Team Profile -> Users -> Rules.
By default, all account comes with the first rule: "All invoices equal to or over $0 requires approval by "Manage Projects and Assignments", which means all invoices requires project manager's approval before payment.
If your company requires a 2nd reviewer for every invoice/certain invoice over a fixed $ threshold, you can do so by clicking the "New" button to add an additional rule.
When adding a new rule, bear in mind that:
1) Rules are applied based on the order of the rules added. Meaning, users with the permission/permission profile in the first rule will have to approve the invoice first, before the users with the permission/permission profile in the second rule can. After the invoice is approved by the users with the first rule, notification will be sent to the users with the second rule, letting them know it's their turn to approve.
If you wish to update rules order, you can do so by clicking the red and green arrows on the left hand side of the rule on the rules tab.
2) You can designate a "permission profile" or a permission to the rule. Once the rule is added, everyone sharing the same permission profile or permission within the team will be notified for new invoices, when it's their turn to approve.
3) If you wish the new rule to apply to all invoices regardless of the invoice amount, simply put "$0" as the amount trigger.