Kamini,
First of all, thank you SO MUCH for calling The PM Podcast "amazing". That is very kind of you.
PMI starts from the perspective that you are an honest PMP who follows the Code of Ethics. Therefore, if you say you listened to the podcast, you are stating the truth.
However, PMI recommends that you keep notes of when you listen to the episodes. Basically... keep a log of your listening activity. To simplify this process I have created a simple spreadsheet that you can use to track this. You can find the spreadsheet here:
www.project-management-podcast.com/index.php/pdu/pdu-logfile