You can add the Bizible script to FormAssembly by copying and pasting the script into the Branding or Custom Code.
Set a Header or Footer for your Forms. If you’re a Professional Plan user, you’ll find the Branding feature in the “My Accounts” tab. Click the “Define a header and footer for your forms” link to open the Branding editor.
There will be three tabs labeled “Page Header,” “Page Footer,” and “HTML <HEAD>". By default, the “Inherit default header” box is checked. The default header is blank.
If you want to add a custom header, footer, or both, uncheck the box. To add the Bizible script, select the HTML <HEAD> tab and paste the Bizible script into the text box. The header, footer, and <HEAD> section will be applied to all your forms, so you only have to set it up once.
For Custom Code:
2) In the Form Builder, click Properties then Custom Code.
3) Paste the code in the Custom Code field and click Apply.
4) Save and test with the address found in the Publish tab of your form's options.