The PAAB does not require a PO. We currently accept EFT or cheque. We do not accept credit cards. For additional information you may find helpful, please see https://www.paab.ca/about-review-fees.htm.
We did some digging and here's what we found:
In the last 6 months, there have been approximately 4087 distinct APS submitted for review from 65 manufacturers. Of these, 87 (just over 2%) were submitted directly from 6 manufacturers. Of these, 2 manufacturers did not use an agency at all during that period.