How to Resolve Error ‘512U’ When Topping Up MobalPay at Yucho Bank ATM

If you are a MobalPay user trying to top up your MobalPay balance at a Yucho (JP Post) Bank ATM and encounter an error with the code ‘512U’ after entering your PIN, it is likely due to your categorization as a “Non-resident” by the bank. If you encounter this error, the ATM will print a statement with the error code displayed:

To rectify this issue and enable successful top-ups, you will need to change your status from “Non-resident” to “Resident.”

Changing your status to “Resident”

  • Gather Required Documents: Make sure you have the following documents ready: 

    1. Bankbook (issued by the bank where you hold your account)
    2. Residence card (Zairyu Card)
    3. Proof of employment (certificate of employment or pay slip) if you are employed 
  • Visit the Nearest Bank: Go to the nearest bank that supports the change of residency status. 
  • Present the Documents: Submit the required documents to the bank representative. 
  • Request Change of Residency Status: Inform the bank representative about the error code ‘512U’ and your intention to change from “Non-resident” to “Resident.” 
  • Verification and Update: The bank will verify your documents and update your residency status accordingly. 


  • Once your residency status is successfully updated to “Resident” by the bank, you can proceed to top up your MobalPay balance at a Yucho Bank ATM without encountering the ‘512U’ error.

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