What you’re seeing
- Customers call to ask about invoices or payment requests your team never issued.
- A vendor receives an email, apparently from your office, announcing new bank details for future payments.
- The fraudulent messages come from your exact address, or from a lookalike domain that differs by a letter or two.
- A customer has already paid a fake invoice and the money went to an unknown account.
- Bounce-backs arrive for messages that nobody in your company sent.
Common causes
Every environment is different, but these are the causes our engineers find most often:
- One of your mailboxes was compromised, letting criminals read real invoices and reply within genuine email threads.
- Your domain lacks a strict DMARC policy, so criminals can send mail that spoofs your exact address and still reach inboxes.
- Attackers registered a lookalike domain that is visually almost identical to yours.
- A customer's or vendor's mailbox was compromised instead, and the fraud is being sent from their side of the conversation.
- Invoice templates, logos and signatures were copied from previous genuine emails or public documents to make fakes convincing.
Why it matters
Fake invoices damage the business on two fronts. Customers who pay the fraudsters may still owe you, leading to awkward disputes, delayed revenue and sometimes legal claims about whose security failed. Even when no money is lost, clients lose confidence in email from your company, and vendors may start treating every payment message with suspicion. If the fraud stems from a compromised mailbox in your tenant, client data and correspondence may also have been exposed.
How AskTechGurus fixes it
Skip the trial and error. A certified engineer works on your actual system, finds the root cause, and fixes it properly.
Tell us what’s happening
Submit a ticket in about two minutes. Paste the error, describe what changed, and pick your tier. No charge to submit.
A certified engineer diagnoses it
A vetted, US-based systems engineer claims your ticket, usually within minutes during business hours, and investigates over a secure remote session you can watch and end at any time.
Fixed and verified with you
The engineer resolves the root cause and confirms with you that it’s working. You don’t just get a workaround, and you get a plain-English summary of what was wrong.
Pay only when it’s resolved
Fixed price from $99, invoiced only after you approve the fix. If it isn’t resolved, you don’t pay.
Frequently asked questions
How can we tell whether our email was hacked or just spoofed?
The message headers and your Microsoft 365 or Google Workspace logs show whether mail truly came from your systems. We review that evidence first, because a hacked mailbox and a spoofed address call for very different responses.
Can you stop criminals from using a lookalike domain?
We cannot take down a domain someone else owns, but we can help you identify it, strengthen your own domain's authentication so your exact address cannot be spoofed, and give you the details needed to report it.
What should we tell customers?
A short notice that you will never change bank details by email, and that any payment change should be confirmed by phone with a known contact, helps protect them while the cause is resolved.