Click on 'Collect Bill Payment'. Fill in Order Id and click 'submit'. This Order Id should be a unique number that will serve as a reference to be quoted across the three parties involved: namely; you, the seller; your customer; and CCAvenue.

On submission, you will be asked for details of your customer and the transaction you wish to raise a bill for. Fill in the details, click submit.

A final version of the Bill, as it will appear in your customer's mail box will be shown to you for confirmation.