SumUp

SumUp is a global financial technology company that offers mobile point-of-sale (mPOS) solutions, card readers, online payment links, and other payment services primarily for small and medium-sized businesses, sole traders, and mobile merchants. Businesses use SumUp card readers and its app to accept credit and debit card payments in person, and can also use SumUp tools to accept remote or online payments. The company focuses on simple, flat-fee pricing and quick onboarding so that small businesses can start taking card payments with minimal setup.

A charge labeled like "Merchant Mkr9s - SumUp" typically means you made a purchase with a business that uses SumUp as its payment processor. In many cases, the descriptor will show a generic or internal merchant identifier (such as “Merchant Mkr9s”) followed by “SumUp,” indicating that the underlying business is using SumUp’s hardware or software to accept your card. The actual goods or services could range from retail items and food to professional services, depending on the specific merchant. The charge may be a one-time purchase, a tip-added transaction, or, less commonly, a recurring payment set up via a SumUp payment link.

If you do not recognize the specific "Merchant Mkr9s" part of the descriptor, first think about where you recently used your card with a small or mobile merchant (such as a market stall, local café, pop-up shop, or service provider) on the transaction date and amount. Often, your receipt, email confirmation, or SMS from the merchant will have their trading name and may reference SumUp. If you still cannot identify the charge, you can contact your bank/card issuer to request more details (such as the merchant’s full trading name and location) or dispute the transaction. SumUp also provides support via its help center and customer service channels, but because they are the processor, they will typically need specific transaction details from your bank statement to investigate.