How to pre-fill custom fields in your payment page’s URL?

You can pre-fill custom fields for customers in the hosted payment pages. The placeholder names will vary for each custom field.

To get the placeholder name for your customer field:

• Go to Settings, click Preferences, and select an invoice custom field.
• Click Edit next to your custom field.
• Use the API Field Name as the placeholder for your custom field.

Also, if your custom field is of the Date data type, make sure that the date value of the custom field is in the YYYY-MM-DD format.