If you're just starting to use blind submit forms with Eloqua you have probably already seen the various Topliners guides or used the Blind Submit code generator. If this is the case you will most likely have a example that looks something like this: http://s[siteID].t.eloqua.com/e/f2.aspx?elqFormName=[FormName]&elqSiteID=[siteID]&emailAddress=<span class=eloquaemail>EmailAddress</span>&[TrackedField]=[StaticValue]
I was doing the same and editing all of the code in notepad. Everything worked fine until I copied it into the hyperlinks window and tested the form. Nothing worked and every time I checked the submission data it the field merge wasn't working.
What went wrong? When you copy and paste your code out of notepad and into the hyperlink field Eloqua recodes (notice gap between “span” and “class” is missing. Your newly pasted code will now look like this:
http://s[siteID].t.eloqua.com/e/f2.aspx@?elqFormName=[FormName]&elqSiteID=[siteID]&emailAddress=%3Cspanclass=eloquaemail%3EEmailAddress%3C/span%3E&[TrackedField]=[StaticValue]
That space between "span" and "class" is critical and for whatever reason Eloqua does not properly recode it. You will have to go in and add "span%20class" in order to have that space correctly inserted. Your new code will look like this:
http://s[siteID].t.eloqua.com/e/f2.aspx?elqFormName=[FormName]&elqSiteID=[siteID]&emailAddress=%3Cspan%20class=eloquaemail%3EEmailAddress%3C/span%3E&[TrackedField]=[StaticValue]
Hope this helps!