Note field is available in Clover Payment Links, it's enabled in Settings > Hosted Checkout. In addition to the Notes Field, Custom Fields feature is coming soon.

Programmers should add a custom field (or even a generic notes field) to payment links. That way when someone pays, they can associate it with a specific invoice number or service date (or item).

This is important. Please consider having your programers incorporate it. It should not be too hard. Your competitor's are doing it and that makes their produce much better from our point of view.

Please add a note field for both customers when completing the payment link so and also for the merchant's when they are creating the payment link. This will allow the merchant to put the service in which the customers are paying for. As it relates to the customers note field it will allow them to add additional information for the merchants base on their business model.