Online Invoice Approval and Tolerances

Hi,

We are in the process of a 12.1.2 implementation and are trying to find the best way to handle invoice tolerances. Basically we would like the users to be able to add up to £50 when matching an invoice to a PO, but if the difference is any higher than this we would like it to go out for further approval.

We are using online invoice approval (AME) for all invoices, but have added the condition to ensure that any invoices matched to PO's do not require further approval. We would however like to put a cap of £50 on this to ensure that approvers keep sight of variances above this.