I want to create a Webservice where companies can place their ad on my webpage. They have to pay money for the ad: periodically every month. I want to realize the payment with PayPal.
But i have to track if the company has paid, and if not i want to deactivate the company-account on my website.
In my opinion, i have to check the date when someone paid to PayPal, write the date in my Database and check one month later if the company paid again.
I couldn't find anything on the PayPal API-Websites.
Can anyone help me or give me a good explanation how PayPal handle those things?