NatWest transfer issue
We’re currently seeing some transfers from NatWest being rejected due to an ongoing issue between NatWest and our banking partner. Work is underway to resolve this but unfortunately the situation is outside of Mimo’s control.
Some transfers from NatWest have been successful, so it is not a complete block. However, where possible, we recommend using an alternative bank account. If that’s not an option, we suggest contacting NatWest directly.
Latest update: 24 November 2025
Occasionally, your bank may decline payments to Mimo. If that happens, don't worry! Here’s what to do based on how you made the payment.
Payment methods
Manual Bank Transfer
A manual bank transfer is when you move money from your bank account to another bank account by entering the recipient's bank details yourself.
Open Banking
With open banking, you authorise a third party (like our partner, Plaid) to securely connect to your bank and initiate payments on your behalf. It’s fast and convenient, but still a relatively new technology, so errors can occasionally occur.
With open banking, users like you can authorise apps or services to securely access their transaction data, initiate payments, or perform other financial tasks without sharing login credentials.
Why was my payment declined?
Manual Bank Transfer
If a bank transfer fails, or has not reached your Mimo Wallet within the expected timeframe, it’s almost always due to something on your bank’s side. Common reasons include:
A fraud or security check
Incorrect account details being entered
A limit on your account being exceeded
Because the payment never reaches us, we cannot see or investigate what happened inside your bank’s systems so it's always best to contact them in the first instance.
Also note that a payment will often show as having left your bank account but this does not necessarily mean that your bank has fully processed it.
What do to:
Contact your bank first
They are the only ones who can see why the transfer was blocked.
Check your account limits
Some banks have strict daily or per-payment limits. If you’re sending larger amounts to Mimo, you may need your account manager or support team to increase them.
If your bank confirms the issue isn’t on their side
Request a proof of transfer from them showing the sending and receiving account details and contact us. Once a payment attempts to reach our systems, we can work with our partners to investigate further but the more information we can give them to help locate the payment, the better. Note that until the funds actually arrive, Mimo doesn't receive any information about the transfer.
Explain recurring transfers to your bank
If you send payments to Mimo regularly, giving your bank that context can help reduce future false alarms.
Open Banking
Open banking flows can fail for a few reasons, such as:
Your bank’s open banking payment limit being too low
Your bank not recognising Mimo as a trusted recipient
General open banking connectivity issues (these happen from time to time)
Because the payment is handled between your bank and our provider (Plaid), Mimo doesn’t have full visibility into each step of the process. Still, we monitor all payments closely and step in whenever we detect an issue. As with manual payments, it is always advisable to consult with your bank first to determine why the payment was declined.
What to do:
Check with your bank
They can confirm whether a limit or security filter caused the decline.
Ask to increase your open banking limit
If the bank refuses, you can always switch to a manual bank transfer.
Reach out to Mimo
If the issue isn’t with your bank, we can work with Plaid to troubleshoot. In many cases, we’ll reach out proactively - we monitor payment flows constantly and investigate anything unusual.
Final thoughts
Most payment failures come down to bank security checks or account limits, especially for manual transfers. And because banks don’t share information about declined transfers, your bank will always be the best starting point. Once a payment reaches our side, we’re here to help resolve any issues quickly.