The Optional Reviewer check box in the AP Unapproved Invoice Entry lines section, Reviewers tab.

When this check box is selected, this reviewer is designated as optional on this line, which allows for one of several reviewers to approve at a given approval sequence.

You can change this setting at the line level without affecting any other invoice lines or approval sequences. On the other hand, if the reviewer on this line also appears in the header Reviewer tab, changes to the Optional Reviewer check box in the header affects all lines to which this reviewer is assigned.

As long as more than one optional reviewer is assigned to each invoice line’s approval sequence, only one reviewer must review and approve in order for the approval process to advance. However, if the only reviewer on an invoice line’s approval sequence is an Optional Reviewer, their approval becomes required in order for the approval process to advance.

Setting ALL reviewers on a sequence as optional does not eliminate the approval requirement for that sequence. If an invoice line’s approval sequence contains multiple reviewers, the following rules apply to allow the approval process to advance.

• if ALL reviewers on a sequence are set as optional, at least one must approve
• if ALL reviewers on a sequence are set as non-optional (Optional Reviewer check box is not selected), all must approve
• if some reviewers on a sequence are set as non-optional and some as optional, all non-optional must approve