Hey @lloydtech 

The $zipcode property that you are assigning will automatically be added to the profile, is it not adding it when someone submits the form? that is exactly how profile properties are attached to a profile. 

Can you try cloning the form and assigning/creating a completely new Postcode property?

@lloydtech give it a try by creating segment and see are you getting zip code info there or create new property for your zip code as per @ArpitBanjara 

Thanks lads, figured it out.

Couple of things:

1. Client had set up a sign-up form that was de-coupled from their List Sign up form - so, edits were taking place on a form that wasn’t being presented to the clients
    
2. The code required is $zip  - this does not populate automatically, but you can add it in.  i Had tried $zipcode but it does not map to a valid field… found this by doing an Export of a previously failed-attempt Profile to get the full field mapping ex Klaviyo ]
    
3. When created, $zip internally gets mapped to $zip inside the Profile… but shows up as ‘Location’ in the beautified labelled fields.  For customers who have arrived through other channels, where zip is not captured, their geolocated city is shown instead.

Cheers...Al