My husband of 20 yrs walked out on me end of January. We'd always only had a joint bank account so I asked him to open his own and I'd keep the account. It was my account before we married and has a great credit score. So we duly sent the paperwork off and it took ages but the bank confirmed he was off the account and his card would no longer work. Yey! Fast forward about a month and today stbxh tells me that when he logs into online banking on his phone he can see my account. We're not amicable. He never even had the banking app before we split up so it's not like he had access before. I've been paid my annual bonus this week. He's turning nasty and I don't think it'll be long before he stops paying his half of the mortgage and loans. Now he can see i have savings (bonus). I felt completely sick when he told me. Now I'm just v angry as well. Can I sue the bank does anyone know?