Quoted from Rdoyle1978:Banks have an upper limit for those types of unsecured transfers - if it's over a million (varies by bank), they may need to use a brokerage house and it can take a while to set up. Many banks won't transfer huge sums because of the risk involved
What risk are you talking about?
From my experience, the client provides the wire instructions. They typically receive that info from the bank that's to receive the funds.
They then confirm the numbers (account numbers etc/instructions) before the sending bank transmits the wire payment.
With the customer signing off before it's submitted, the bank takes zero risk. Especially since the wire authorization that's signed by the customer waives the banks liability.
Banks transfer huge sums of money routinely. It's what they do. Even more so when you get to the Commercial/Business side of things, vs the Personal side -but many, many clients transfer what most of us would consider "large" sums of money frequently.