Yes you are correct there are many rules I can't list them all here. The point is they are fixed rules and one is transaction amount. > Very large number of tr

Yes you are correct there are many rules I can't list them all here. The point is they are fixed rules and one is transaction amount. > Very large number of transactions on personal accounts is also one of those rules. Yes I suspect 1000's of trx on the accounts is what flag the whole thing to the bank. > That sounds like fraud, not money laundering rule. You have to take what I've said in context with the whole comment and not take a single part out of context. As I said for money laundering you'll get consistent large transactions that don't make sense (say £250k each week from a pizza shop). Banks already know how to spot these large weird transactions so a method to hide them is to split them down into smaller transactions. My example with paying the kitchen was to show that the banks wouldn't notice the £500 transactions rather than the single £5000 transaction.