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Security & privacy
Defend 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 ArticleIncompatible 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 ArticleAPP fraud
Protect your business from APP fraud and learn more about the new reimbursement rules if you’ve fallen victim.
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 ArticleActivate secure login
Keep your profile secure by setting up MFA so any login attempts from unknown devices require additional authentication.
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 ArticlePayment disputes: Chargeback procedures
Chargebacks can be stressful. So to help out, here's a guide to payment disputes, including SumUp’s own chargeback procedure, from the first request to the final decision.
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 ArticleGDPR, SumUp and my data
At SumUp, we take data protection very seriously. Here's everything you need to know about how we handle your information and keep your data secure.
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 your device is blocked or otherwise defective, you may be eligible for a free replacement. Here's how you can get a replacement device if yours breaks.
Read ArticleMerchant security
The security of both your data and that of your customers is our top priority at SumUp. This is what we do to keep it safe.
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 ArticlePayment disputes: Contesting chargebacks
There are a variety of scenarios that could lead to a chargeback and each of them requires slightly different supporting evidence to contest. Here, we’ve compiled a list of common types of payment dispute and how to object them.
Read ArticleInvoice inquiry
We are obliged by our payments providers to check the legitimacy of the transactions. We might be required to collect additional information, such as an invoice (in PDF format), from you to verify the payment.
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