Mercari is committed to ensuring our users feel at ease using our services. Read the latest security alerts and learn what you can do to help.
The more characters you use in your password, the stronger it gets. We recommend using a password at least 12 characters long. We also recommend using a mix of letters, numbers, and symbols in your password.
Using a unique password for each website/app is safer than reusing the same password multiple times.
If you aren’t sure how to check or update your phone number, see our guide to changing your verified phone number [Japanese].
Setting up a passcode to unlock your phone makes it harder for other people to use your phone when you’re not watching.
Check your email and notifications to see if there’s been any activity on your account that you don’t remember. We also recommend checking your Merpay usage history regularly to make sure there haven’t been any payments made without your knowledge. You can see your payment history by going to the Merpay tab and tapping “残高” (balance) and “ポイント” (points).
If you receive any suspicious email messages claiming to be from Mercari, delete them immediately without opening the message or clicking on any links.
If you’re registered for iD payments on Merpay, we recommend removing the iD information from the Mercari app on your old device before starting to use your new device. To learn how to do this, see our guide to switching devices [Japanese].
If you lose a device logged into your Mercari account, contact us through the app and we’ll take action immediately so no one else can use your account. For more instructions, see our guide to contacting us about a lost device [Japanese].
Letting another person use your account is an infringement of Mercari’s Terms of Service. Mercari is not responsible for any trouble that may arise from doing so.
You can check your account’s login history by going to the “マイページ” (My Page) tab, tapping “個人情報設定” (Personal Information Settings), and tapping “ログイン履歴” (Login History). Check if there’s been any activity on your account that you don’t remember.
Check to see if anyone else has accessed the email address you have registered on your Mercari account.
Mercari offers the option to log in using a social media account (Facebook, Google). If you use a social media account to log in to Mercari, check to see if anyone else has accessed that account as well.
After making sure your registered email address (or social media account) is safe, change your Mercari password. For instructions, see our guide to changing your email address/password [Japanese].
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