Dan,
I gave it a try and we are almost there.
If the box is not checked, I get the error message. If the box is checked the script attempts to connect to the URL where the script resides followed by /emailaddress. The file is temporarily located at
http://www.lewisborogov.com/dan.pdf.
Howard
This is what I have for the click - javascript, client
var check = xfa.resolveNode("CheckBox1");
var url_address = "myemail@xyz.com";
//Getting the document's target object. It be used later in order
//to send the document.
var doc = event.target;
//Validating the document. You can put here the rest of the
//document's validations.
if(check.rawValue == 0){
app.alert("You must certify that you have read Section 78.");
}else{
//Submit the document. See the documentation for
//more submit options.
doc.submitForm( { cURL: url_address } );
}