Tina, I didn't hear back from you, so I'm going to give you the answer before I step away for the night. But please don't respond until you've moved the thread to the right place.
Sounds like you want a comma-delimited list of tokens, but you don't want any extraneous delimiters if a token is empty. This is a common situation. You'll do this using an Email Script token (a.k.a. Velocity token).
When creating Velocity tokens, always make sure you check off the fields you need on the right-hand-side tree. Here's a quick guide to using the Script Token Editor:
And the code you want is:
#set( $allPossibleFields = [ $lead.field1, $lead.field2, $lead.field3, $lead.field4 ] ) #set( $delim = ", " ) #set( $lastDelim = ", and " ) ## ---- NO NEED TO EDIT BELOW THIS LINE! ---- #set( $filledFields =  ) #foreach( $field in $allPossibleFields ) #if( !$field.isEmpty() ) #set( $tmp = $filledFields.add($field) ) #end #end $display.list($filledFields, $delim, $lastDelim)
$lead.field1 - $lead.field4 represent all possible fields in your list (obviously "field1," "field2," etc. are replaced with the real Velocity names of the fields in your instance). You can have more than four, that's just an example.
$delim is the delimiter between all items but the last two (in the example, it's a comma and a space).
$lastDelim is the special delimiter between the last two items. Here I've used an Oxford comma. You could use the same value for $delim and $lastDelim.
So if you had four fields and the third one is empty, sample output would be:
one, two, and four