UPDATE: Bank staff visiting house due to accidental overpayment in cash.
Update to this https://www.reddit.com/r/UKPersonalFinance/s/MX15dK4gvs
My sister called the building society's fraud number and was told to call the branch. They confirmed this was a member of their branch and that it was of course completely against policy. My nephew was told he could keep the £100 and they have offered another £100 in compensation. Thoughts?