Transferring USD from US to Ireland

If fairness to Revolut, the receiving bank can't trace a transaction that has not arrived, only the sending bank can do that. The next thing is that many US banks themselves do not have access to the international transfer infrastructure, but use a corresponding bank instead and in my experience when things go wrong they really go wrong and part of it is because sending bank does not have full control over their process. So which bank are we talking about?

The OP has not been on since they made that post. But I would not be at all surprised if they have not managed to get their hands on the cash yet. It will eventually bounce back to the sender, but in the case of US banks that could take months!

As I pointed out before receiving banks can't track transfers unless the money actually arrives in their system and once it does there is not much that can go wrong other than incorrect details of the clients account. If that happens it will end up in a suspense account, so it's easy for them to check up on it an fix the problem.

In my experience it's hard to find anywhere worse than the US for fouled up international transfers. It's not a big part of their business and so they don't invest much in it nor train their staff on topic. I have seen some of their systems where the success of the transfer depends on a putting a comment in a text field with the additional data needed to make the transfer and so on. Any time I have to send money via a US bank I always send a small test transfer first to see how well it works.