Yes, but if you had went to branch to close personally, you should at least get something as confirmation. Note for future, also personal experience, I had went to close a/c and FD cc in ICICI, they told me NOC would be sent on mail, so I said at least give me receipt of my request to close a/c and cc. If you ask, they have to give, make sure you have some kind of number on it to track request and date of your request and sign of person who took it, for any future problems. Had did same for axis when I downgraded my a/c.