I get 300+ payments per month via internet banking.
Superb, until the bank decided to stop putting the references on the payments.....
Santander by any chance?
Got it in one!
I ended up putting in a formal complaint about this issue. It caused a problem when names and amounts were duplicated. The final answer I got was something like "We are aware of the problem and will try to fix one day but we've no idea when". Bank transfers now go into my Co-op account. So that's a few hundred pounds less per month that Santander can play with on the money markets. I was pretty disgusted with them to put it mildly. I would take my cash and cheques away too but they are convenient to make a deposit as it's 24/7 banking with the ATM only a few minutes walk away.
Apparently the problem with the references began with the introduction of the "faster payments" system. I did point out to them that Co-op manage perfectly ok. I also suggested that due to this (and other gaffs), that the IT managers should be sacked, boiled in oil and tarred and feathered. It was tongue in cheek but I really do feel that some re-training is required.