A business trades as a sub-merchant when it accepts card payments under a payment facilitator's scheme registration instead of holding an acquiring contract of its own. It sells in its own name and receives its own money, but the contract sits between the facilitator and the acquirer, with the seller one level below it.
Signed up in the morning, taking cards by lunch
The sequence is short by design. The seller enters business details, beneficial ownership and a bank account; the facilitator screens the names against sanctions and fraud lists, assigns an identifier that will appear in scheme data, and switches acceptance on. Nothing is opened at the acquirer, because the merchant account already exists and belongs to the facilitator.
The checks are lighter than full underwriting, not absent. Scheme rules set a floor, and facilitators differ mainly in how much they add on top and how closely they watch afterwards.
The ceiling written into scheme rules
The model is licensed for small sellers, so the card networks cap it. Historically, a seller processing above roughly one million dollars a year under the Visa and Mastercard facilitator programs has to be moved onto its own account and its own merchant identification number.
Growing businesses cross that line without noticing, usually during a peak month, and find out when their platform sends an onboarding request with a deadline attached.
Who pays when a sub-merchant disappears
The facilitator. It signed with the acquirer, so unfulfilled orders, chargebacks and scheme fines come out of its own balance. A payment facilitator that onboards in ninety seconds and monitors nothing is buying growth with its own capital.
From the seller's side that exposure shows up as a delayed first payout, per-seller reserves, sudden holds on unusual volume, and a right of suspension the facilitator can exercise without debating it.
What the seller hands over in exchange
Pricing, mostly. Rates are set across the portfolio rather than negotiated, payout timing follows the platform's schedule, and the text on the customer's statement may name the platform unless the facilitator supports a per-seller payment descriptor.
Sub-merchant or aggregated seller
Written sub merchant or sub-merchant, the term is used loosely, and the distinction from an aggregated seller is regulatory rather than commercial. Under an aggregation model funds move through the aggregator's own accounts and sellers are not individually registered with the schemes. A sub-merchant is registered and identified in the transaction data. Which structure applies decides whose money is being held, and therefore who needs a license to hold it.