Some billers have hundreds or thousands of modifiable options on their
join form. NATS lets you modify these extra features, which we call
Nextra features, by adding the nextra field to the NATS
pre-join form.
You can use the Nextra feature by adding the keyword nextra to any
HTML name field, followed by the biller's shortname and the
special value in brackets. In short:
nextra[Biller Shortname][Special Value]. For example,
you can send the special value "date" to CCBill using any of the
following examples:
- <input type="hidden" name="nextra[CCBILL][date]" value="2006-06-11">
- <input type="text" name="nextra[CCBILL][date]">
- <textarea name="nextra[CCBILL][date]" cols="10" rows="10"></textarea>
If you want to send the same special value to NetBilling, you need to
add a nextra command. For example: [NetBilling][date].
(Note: You can get the biller's shortname using the Billers Admin; click
on the biller's name and find its shortname option.)