How to utilize the URL query string

Paperless Transactions Secure forms utilize URL Query String variables to be able to prefill most of the form elements via a link or form submission. These methods are detailed below.

Here is a list of the variables that can be prefilled using this method.
Optional Query String parameters
c1 custom field #1
c2 custom field #2
c3 custom field #3
c4 custom field #4
c5 custom field #5
c6 custom field #6
c7 custom field #7
c8 custom field #8
c9 custom field #9
c10 custom field #10
….continue to c30 – custom field #30
a Amount
r Recurring (true / false)
f Frequency ( 52 / 24 / 12 / 4 / 1 )
s Start Date ( any valid date, ie: 1 / 1 / 2010)
e End Date ( any valid date, id: 5 / 1 / 2010)
p Payment Method ( ach / cc )
fn First Name
ln Last Name
sa Street Address
ci City
st State
zi Zip
To begin prefilling you must place a question mark at the end of the page URL
ex: https://secure.paperlesstrans.com/SaveATree?
After the question mark, you can begin placing the variables and what you would like them filled in with always
separating each variable with an ampersand (&).
ex:https://secure.paperlesstrans.com/SaveATree?fn=John&ln=Donor
After loading, the page will repost and the link will appear in the address bar as normal
(https://secure.paperlesstrans.com/SaveATree).