MID (merchant ID)
The number identifying a merchant account to the acquirer and the schemes. A business can have more than one — commonly one per outlet, or per channel — and how they are arranged decides whether reporting arrives combined or separately. It is the reference to quote when contacting a provider about anything account-level.
Why it matters to a merchant
The number to have to hand before calling anybody about anything account-level, and the number whose arrangement quietly decides what your reporting looks like. A business with several outlets should ask deliberately whether it wants one per outlet or one across all of them — that choice is easy to make at setup and awkward to change once a year of reporting exists in the other shape.
Read more: Running payments across several outlets
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Related terms
In this section: At the counter