Overdrew by <€50 - will this affect my credit rating?

I recently overdrew on my current account due to a phone bill. I was for less than €50 and I was paid the following day. I do not have an authorised overdraft. Will this affect my credit rating??

No, overdrafts are not recorded on your ICB unless subject of legal proceedings.

As Norfbank says, it'll be fine. Especially a small amount like you stated.