Why this matters
A data breach is when information held by a company you use is exposed or stolen. It's often out of your control — but what you do afterwards is very much in your control. Leaked data is frequently used to target people with scams, so acting quickly limits the damage.
What a breach can expose
Depending on what was stored, a breach might reveal:
Email addresses and phone numbers.
Passwords (sometimes in a form that can be cracked).
Names, addresses, and dates of birth.
Account or, less commonly, payment details.
Even "minor" leaks matter: fraudsters combine leaked data with other sources to craft convincing, personalised scams.
How you might learn about a breach
A notification from the affected company.
News reports about a service you use.
A breach-notification service alerting you that your email appeared in a leak.
A sudden rise in spam, scam calls, or phishing aimed at you.
What to do right away
Change your password for the affected service — and change it anywhere you reused it (then stop reusing passwords). → See: Strong Passwords & Password Managers
Prioritise important accounts, especially anything financial or your email (which can reset other accounts).
Watch closely for phishing. Breach data fuels targeted scams — be extra sceptical of messages that reference real details about you. → See: Phishing Explained: Fake Emails, SMS & Websites
Monitor your account for transactions or changes you didn't make. → See: Recognising Suspicious Login Activity
Contact us through the 24/7 in-app support chat if you believe your Blackcat account details were exposed.
Longer-term protection
Use unique passwords everywhere, so one breach never unlocks another account.
Consider a password manager to make that practical. → See: Strong Passwords & Password Managers
Reduce what you share, so less is available to leak. → See: Protecting Your Personal Data Online
Stay alert after any breach — scammers may use the data weeks or months later.
Beware of "breach" scams
After breaches, fraudsters send fake "your account was compromised" messages to panic you into clicking links or sharing details. Ironically, the "breach alert" itself can be the scam.
Don't act on links in such messages.
Verify directly by opening the official app or site yourself.
Ask us in the support chat if a message claiming to be Blackcat worries you.
What to do if data leads to fraud
If money moved or your account was accessed, contact us immediately through the in-app support chat.
Change affected passwords and review recent activity.
Keep evidence and report what happened.
→ See: I Think I've Been Scammed: Immediate Steps