What resources can I use to find specific dates when companies are suppose to payout dividends?

Hello, I believe that a couple companies that I invested in never paid me my dividends. I am unsure when the companies were suppose to payout dividends so I can't prove anything. I know that some companies payout dividends quarterly, while others yearly.

Can anyone please recommend a resource that I can use to find out dates when companies are suppose to payout dividends? Thank you and looking forward to your replies!

Submitted March 04, 2017 at 01:39PM by FutureFlipKing http://ift.tt/2m8ryWs