Coincheck complaint?

Do you have a dispute or a bad customer experience with Coincheck? Report it through our website to maximize the chance of getting it resolved.

We help you write an effective complaint in minutes. Our AI models are trained on thousands of effective complaint letters. Then we push it through emails, social media, paper complaint letters and other tools at our disposal. And you are not alone: our helpful community is there for advice.

Coincheck is based in Japan: the telephone number listed for the company is 03-6416-5370, a Tokyo landline at the ordinary Japanese call rate, and the support email address is support@coincheck.com. Calling from abroad, dial Japan's country code and drop the leading zero. Account questions move faster through the inquiry form in the Coincheck app or on the site once you are signed in, because support cannot discuss an account with an unverified sender, and the Japanese language route is generally the better staffed one. Have the registered email address, the transaction ID, the wallet address and network, and the date and time of every step ready before you write.

Account opening stuck at the identity check? Raise it through our complaint process and we push it out by email, social media and printed letters.

A pending withdrawal at Coincheck is usually held by a check on the account rather than by the network: an unfinished verification step, a security review after a password or device change, a bank account that is not registered in the same name, or a limit on the amount. Look for a transaction hash first, because a hash means the crypto has left the platform and the delay sits with the network or the receiving wallet. For a yen withdrawal, compare the bank details on file with your bank account exactly, including the account holder name, and check the cut off for same day handling on the bank side. Screenshot the pending screen, note the exact time of the request and ask in writing what will release it.

Withdrawal stuck with no explanation? Open the case with us: our AI opens a case file and keeps coaching you on what to send and when to escalate.

Verification is an identity check run to Japanese rules, so the time depends far more on the quality of what you submit than on the queue: a document in date, readable in full, with the name and address matching the account and the bank account exactly, goes through much faster than one that has to be resubmitted. Applicants outside Japan should check what residency and documents the platform accepts before depositing anything. If the check is rejected without a clear reason, ask in writing which item failed and what would satisfy it, and keep the date of every upload. Exchanges in Japan are licensed and supervised, so a firm can also tell you in writing which external body handles complaints about it if you get nowhere internally.

Coincheck offers two ways to buy, and the difference between them explains most of these questions: an instant buy and sell service quoted at the platform's own price, and the trading market where your order meets other users. The instant route carries a spread, the gap between its buy and its sell quote, and that spread is a real cost even when no separate commission is shown. Compare the quote against the market price before you confirm, and screenshot the quote, the amount and the time. Network fees come off on top when coins are sent to an outside wallet, so the amount that arrives there is smaller again.

Paid far more than the rate on screen? Write it up on our website in minutes: we draw on thousands of complaints that actually worked, so nothing important is left out.

Nothing has been reported about Coincheck here yet. Our research shows what typically goes wrong at crypto exchanges: yen or crypto withdrawals that stay pending, account opening held up at the identity check, deposits credited late or to the wrong balance, an app that fails to load or place orders in busy periods, and the gap between the rate displayed and the amount that actually arrives.

Sound familiar? Be the first to report it and open the record for other consumers.

Your complaint gets its own public page on Complain.biz and we get to work: we bring it to the attention of Coincheck through emails, social media, paper complaint letters and other tools at our disposal.

And we stay with it after you file. Our trained AI opens a case file for you and keeps coaching: what to reply, when to push again, and how to escalate if nothing happens.

Yes. We have an active community of consumers, and complaints here are public: people who ran into the same problem with Coincheck can give you advice or back you up with their own story. A complaint with a community behind it is much harder to overlook.