A bank a/c is an additional item to keep from the OH
Even if online
I bet a pound to a penny that at some point you will get something in the post
There are threads on here about how to generate cash if you have an inquisitive OH
One thing i used to do, b4 me & the OH parted company, was to pay for stuff like a curry with mates on a card
Some would pay by card however some cash, which can be hoovered up
Spread the withdrawls, smaller amounts
& if purchasing something on a debit card add an amount as a cashback
even if only 20 or 30, these will add up
& bin the receipt
Punting bank account. Might have to set one up. I'm always slightly paranoid my Mrs will demand to see finances one day and ask what all the large cash withdrawals are about...