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Security & privacy
Restricted businesses
As a regulated entity, we operate under strict requirements imposed by the financial regulator, the card schemes (Visa, Mastercard and American Express) and our acquiring banks, who act as a gateway to the card services.
Read ArticleReduce the risk of chargebacks
The best way to reduce the risk of payment disputes is to ensure customer satisfaction at all times, but you can also take additional steps to take payments securely.
Read ArticleUnderstanding SumUp charges on my bank statement
What is this SumUp charge on my bank statement? Here's how you can figure out what the charge was for.
Read ArticleHigh-value transactions
Here’s how to accept high-value payments while reducing the risk of a chargeback or other complications.
Read ArticlePayment disputes: what is a chargeback?
A chargeback is a request for money after a cardholder questions the validity of a transaction. Chargebacks may also be preceded by requests for information such as retrieval requests or fraud reports.
Read ArticleLost or stolen card reader
What happens if your card reader goes missing? Here's how to report lost devices and ensure your data is protected and prevent fraudulent use.
Read ArticleRecognise phishing attacks
Phishing is an online scam technique whereby scammers impersonate legitimate organisations or people in order to access sensitive information. The following tips will help you recognise and avoid phishing scams.
Read ArticleMy card reader is blocked
If you see "Blocked device", your device's security mechanism has triggered. Here's what to do with blocked card readers and how to prevent future blockages.
Read ArticleHow secure is my password?
If you get a warning that your password is on a known list of common or leaked passwords, you may be at risk to hackers. Here’s what you need to know.
Read ArticleSecurity
Your security is of the utmost importance to us at SumUp. Here, we've collected information on everything you need to know about how we keep you secure.
Read ArticleDefend against phishing attacks
Prevent the loss of sensitive information by defending against phishing scams that seek to steal and expose your personal information. Here are a few tips on how to protect yourself against phishing.
Read ArticleInvoice inquiry
We are obliged by our payments providers to check the legitimacy of transactions. We may be required to collect additional information from you, such as an invoice (in PDF format), to verify the payment.
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