iframe code

Can I get the data of the customer putting their details in an affiliate link by using Iframe? Like if i am running an ad of solar panel leads offer and people are putting their data on the affiliate link (advertiser's landing page, not mine) and i want to have the data they're providing like...

I'm using an iframe to link to a site, but the iframe isn't passing the URL parameters which shows the 'addif' The pages loads, but the 'affid' is blank on the site, so no sales allocated to me. Anyone have any ideas how to correct this? Thanks! This is the code I'm using <frameset...