Salsa Engage allows you to pass in field data via a query string so that you can pre-populate info on your forms. Here's how it works:

Identify the parameters you wish to pass into the form fields
Append those variables to your activity address
Share the full address on your website or other channels

Default Parameter Names and Variables

Each form field on a Salsa Engage Activity page has a parameter name (this includes custom fields).

Below is a list of our default fields you can pass in a query string to pre-populate the fields on the forms. The variables are in italics:

Field Name	Variable
First Name	person-firstname
Last Name	person-lastname
Email Address	contact-email
Address Line 1	address-line1
Address Line 2	address-line2
City	address-city
State	address-state
Postal/Zip	address-zip
Country	address-country
Donation Amount	amount
Recurring Amount(if only offering a recurring option on the form)	recurringamount
Set the donation as recurring?	recurring (value of yes)
Opt-in Status for emails	receive-updates (value of yes)
Group Name(Mailing Lists or Static groups can be appended)	sl_gr
Tracking code	sl_tc

For Custom Fields, the variable will always start with scf and then the field name. You can access the parameter value by clicking on that field in your activity form:

Write the URL

The format of the Salsa activity form is standard for any query string, just like UTM parameters for Google Analytics.

For example, the default activity link would look like https://subdomain.salsalabs.org/donatenow/index.html.

When using the parameters above, you could populate the name, email and donation amount by setting it up as...

https://subdomain.salsalabs.org/donatenow/index.html?person-firstname=John&person-lastname=Doe&email=johndoe@gmail.com&amount=10

*If your donation form does not have a button for $10, this would be populated directly into the Other amount field. If you do not have the Other amount box, none of those options will populate with a choice.

This string uses the following symbols:

Symbol	Definition
?	Use the question mark only after the URL. It indicates that what follows is a query string.
=	Use the "equals" sign to indicate with what the field for the parameter that you enter should be populated.
&	Use the ampersand to concatenate multiple parameters/value combinations.

Manually Add Tracking Codes to a URL

Salsa Engage also enables you to add a Salsa Tracking Code parameter to your URLs manually.

Add Default Tracking Codes to Activities

Please see this article for more information on adding a default tracking code on an Activity for identifying the source of a transaction or supporter if you do not pass the code into your form.