What is a merchant ID? David Viljoen July 23, 2021 08:13 Updated Follow Each Adumo Online merchant is issued with a Aumo Online Merchant ID. This identifies the merchant on Adumo Online's Back Office system. Related articles What is a terminal ID? What is my Merchant ID and how do I find it? What is an application ID? Which banks can I integrate into? What is a referral URL and how do I add one? Comments 0 comments Please sign in to leave a comment.