Related sections
Keep your profile secure by setting up MFA so any login attempts from unknown devices require additional authentication.
Read ArticleIf 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 ArticleWhat 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 ArticlePrevent 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 ArticleAs 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 ArticleThe 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 ArticleA 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 ArticleRetrieval requests and fraud reports are cardholder requests for more information on a transaction. They aren't requests for money, but could lead to a chargeback if the requested information isn't provided.
Read ArticleThere 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 ArticleChargebacks 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 ArticlePhishing 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 Article3D Secure 2 (3DS2) and Strong Customer Authentication (SCA) are measures put in place to make online payments more secure. SCA verifies a customer's identity before confirming purchases with the intent to reduce electronic payment fraud.
Read ArticleHere’s how to accept high-value payments while reducing the risk of a chargeback or other complications.
Read ArticleIf 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 ArticleYour 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 ArticleThe 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 ArticleAt 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 ArticleWe 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.
Read Article