You probably already know this, but just in case. If you are an affiliate of Home Depot and receive their weekly/monthly affiliate emails that contain current promotions, the affiliate links contained in the email are NOT pre-coded with your PID.

When you click on the "Get Html" links on the emails, the page that renders with an affiliate link does say..

The following link code is not valid and is for preview purposes only.

So they are noting that, but just in case you don't pay attention to that text and just copy the affiliate link...