Do you think all instant crypto exchanges are the same? Don’t believe it. They say “no KYC” and “instant swaps,” but a lot of them are running complex scams that take your money. Here are the five most common tricks and how to stay safe from them.
1. The “Partial Payment” Scam
How it works: You send 1 BTC and expect to get the same amount of USDT back. The exchange only sends you 70–80% of what you should get, saying that “market volatility” or “liquidity issues” are to blame. Your transaction is “complete” by the time you notice, and support stops answering your calls.
Things to watch out for:
- No clear rate of exchange before sending
- Terms that aren’t clear about “final amounts may vary”
- There is no proof of the transaction ID or the blockchain
A real story about a victim: “Sent $10,000 in ETH to [redacted exchange] and got $7,200 in USDT back. They said there was slippage, but the rate only changed by 2% during my transaction.” – User on Reddit, 2025
2. The “KYC Trap” Exit Scam
How it works: Exchange says “no KYC needed.” They suddenly want proof after you send crypto because they think something is wrong. They keep your money if you refuse or can’t give them the documents they need. Even if you do give KYC, they still find ways to freeze your account.
The setup:
- Let you successfully make 2–3 small purchases
- Wait for a big deal (more than $5,000)
- Set the KYC trap after you’ve sent money
- Never process withdrawals, no matter what proof you have
Signs to look out for: If an instant exchange suddenly asks for KYC after you send them your crypto, they are definitely trying to scam you.
3. Manipulation of Hidden Fees
How it works: They say there is a “0.25% fee,” but they actually take 5–10% through:
- Fake currency rates: Show Bitcoin at $95,000 when it really costs $100,000
- Fees for hidden networks: Say that gas costs $200 when it really costs $20
- Fees for processing: Add mysterious fees after you send crypto
- Minimum amount tricks: Make you send more than you need to
For example: Reports from SimpleSwap users: “Website said there was a 0.5% fee. What is the final calculation? I lost 8.3% of my worth. They said there was ‘network congestion’ when there wasn’t.”
4. The “Maintenance” Disappearing Act
How it works: Sending a lot of money works fine, but then things go wrong. Right after you make your deposit, the site goes into “maintenance mode.” Days go by, then weeks. The site either never comes back or comes back and says your transaction “failed,” but your crypto is gone.
The pattern:
- The site works great for small amounts
- You feel more sure of yourself and try a bigger sum
- “Technical difficulties” right after the deposit
- Email to support bounces back, and Telegram is gone
5. Fake Order Book / Liquidity Scam
How it works: Exchange has tight spreads and a lot of liquidity to draw you in. They say “liquidity dried up” after you send crypto, and then they either give you bad rates or don’t finish the exchange at all. You can either take 60% of the value or wait forever.
How they pretend to be real:
- Show false numbers for volume
- Show order books from other exchanges
- Make fake trades between their own wallets
- Promise rates they can’t keep
How to Tell if an Instant Exchange Is a Scam
Red flags right away:
- Domain name was registered less than six months ago
- No information or registration for the company
- Rates that are too good to be true (much better than anyone else’s)
- You need to make an account to use “instant” exchange
- There are no reviews on Trustpilot, or they are all fake 5-star reviews
- You can only get help through Telegram or email
- This website is a copy of another exchange’s site
What Makes Changeum.io Different
Seeing these scams ruin faith in instant exchanges, Changeum.io was built on the ideas of openness and safety:
1. Real Non-Custodial Architecture
Changeum never keeps your money. You don’t send crypto to Changeum wallets; you send it directly to liquidity providers. This means that exit scams can’t happen because there isn’t a central wallet to steal.
2. Rates are guaranteed before you send
The rate you see is the rate you get. Changeum shows you the exact amounts, including all fees, up front. No surprises and no excuses for “market volatility.” You get a message before you send anything if rates change.
3. There will never be any KYC traps
Changeum doesn’t ask for emails, make accounts, or spring KYC rules. Since they don’t have an account system, they can’t technically require KYC. If you don’t have an account, you can’t get caught in the KYC trap.
4. Clear Fee Structure
Service fee of 0.25% fixed. No extra fees for processing, hidden charges, or network fees. The network fee for the blockchain is shown separately and goes straight to the miners, not to Changeum.
5. Established Reputation
- In business since 2019
- Registration of the company has been confirmed
- Reviews from real users on a number of platforms
- Support that is responsive (not just on Telegram)
- A clear refund policy with proof from the blockchain
How to Check Any Instant Exchange
Before you give a lot of money to an exchange:
- Start small: First, try it out with $20 to $50
- Look over the math: Find out exactly how much you should get
- Set a timer: Real swaps take between 5 and 30 minutes to complete
- Check on the blockchain: Check that transaction IDs are real
- Support for testing: Before you trade, ask a technical question
- Research area: Check the registration date with WHOIS
- Read real reviews: Not just ratings, but also detailed negative reviews
What to Do If You’ve Been Scammed
If an instant exchange took your money:
- Write down everything: Screenshots, transaction IDs, and emails
- Tell the authorities: Send a report to IC3.gov (the FBI) and the local police
- Tell the community: Post on Twitter, Reddit, and BitcoinTalk
- Get in touch with the address exchange that will receive it: If money went to a big exchange
- Keep an eye on the money: Follow the money with blockchain explorers
Sadly, it’s not common for people to get their money back after being scammed by an instant exchange. The only real way to protect yourself is to stop it.
The Bottom Line
There are a lot of wolves in sheep’s clothing in the instant exchange space. Many of them are advanced scams that promise privacy and ease of use but are really just trying to steal your crypto. Knowing what to look for is the difference between losing everything and trading safely.
Changeum.io shows that instant exchanges can be honest. No need for an account, no hidden fees, and no KYC traps—just clear, quick swaps that work as promised.
Don’t make these mistakes. Save this guide as a bookmark, share it with other traders, and always remember that if an instant exchange looks too good to be true or changes its rules after you send crypto, you’re being scammed.
Be careful, trade wisely, and never send a lot of money to exchanges that haven’t been tested.
Have you been taken advantage of by an instant exchange? Tell your story in the comments so others can be warned. We can work together to catch these criminals and keep the crypto community safe.
