I have received a few emails from PTSB warning me about my account being locked, email has a form attached. Do not click on the form or any link, remember your bank should not contact you looking for information in this way ever. If your bank was worried that something fraudulent had occured with your account they would contact you in a more formal manner, not an email that is phishing for information.
I knew it was a scam straight away as I am not a PTSB customer and never have been.