I’m in the process of applying for a mortgage with Barclays through an intermediary. My intermediary is entering our Monzo account details onto the system and has them down correctly (we’ve treble checked). However Barclays aren’t recognising it as an account.
The team that @Sam87 mentioned above will look into it and hopefully they can sort it
If they’ve spoken over the phone, sometimes it’s the customer service representative having outdated knowledge in thinking that Monzo is not a proper bank, like in their early days when they just offered pre-paid cards. When in fact they now have a full banking licence.