What does "Fulfillment Date" mean?

If you use Paytm to pay your bills, you've probably seen the words "Fulfillment Date" with a specific date associated.

What the does it even mean?

Fulfillment date is the date the funds are sent to the biller. This is also the date the biller will honor, as the time of received payment. Some billers may take a day or two to post the payment but it is a guarantee that they will follow the fulfillment date.