We've had Black Friday - now it's Cyber Monday, and shoppers are expected to spend a whopping £1 billion.
The online-only event lasts just 24 hours. But how do you avoid falling prey to internet scammers?
Follow these top tips from Financial Fraud Action UK:
1. Take five before you buy
If you are using a retailer for the first time, always take time to research them before you give them any of your details. Be prepared to ask questions before buying.
2. Trust your instincts
If an offer looks too good to be true, then there is often a catch.
3. Be sure you know who you are dealing with
Always access the website you are planning to buy from by typing the address into your web browser - and be wary of clicking on links in unsolicited emails.
4. Look for the padlock symbol in the address bar
It is a good indication that the retailer is reputable.
5. Only use retailers you trust
For example, ones you know or that have been recommended to you.
If you are buying an item made by a major brand, you can often find a list of authorised sellers on their official website.