Citizens National Bank will never send you an e-mail asking for your sensitive personal information such as passwords, social security number, credit card numbers or other sensitive information.
If you're suspicious about the true identity of any website page, right-click on any open space on the page (not a link, graphic or text) and choose Properties from the pop-up menu. You'll see a box with the real address displayed. Imposter websites will likely have a long address and may contain 'cnbohio', but to ensure you are visiting an authentic CNB site the beginning of the address should always appear like this http://www.cnbohio.com. In certain cases there may be additional file info following the http://www.cnbohio.com such as http://www.cnbohio.com/contact_us. This is still a legitimate CNB website page because the 'cnbohio' immediately follows the 'http://www.'.
Never trust that the link address you "see" is the link you'll be connected to if you click on it. For example, you might expect that the link below will connect you to the FDIC website, however when you click on it you will see that what is displayed in the main message body is not what is programmed into the message code. If you click the example link below you will see that it is scripted to open a website for the American Cancer Society.
In a real phishing situation you might see http://www.FDIC.gov in your message body, but it would link you to a hoax website where you would be asked to divulge personal information. To avoid clicking on a suspicious link, you can roll your mouse over the link and see what is displayed in the bottom of your browser window.