Why Your Letterman Sponsor Banner Isn’t Showing (and the Exact Fix)

Think stack of cups. If a lower cup is missing, the top one falls. Follow this exact order and your banner will appear the first time:

 

1. Create the Advertiser
   Use the business name (e.g., “Castro Coffee”). Keep naming clean and consistent.

2. Create a Campaign under that Advertiser
   Example: “October Launch.” This is where your banner files live.
   
   

3. Upload your banners to the Campaign (must be one of these):

   • 480×60 (thin horizontal)

   • 300×300 (square)

   • 1920×400 (wide header/hero)
     Anything else? Letterman won’t accept it.
     
     

4. Assign the banner in your Publication’s Active Ads
   Open Active Ads, choose the section (e.g., Right Section or Header), then pick the banner spot and select one of the banners you uploaded in the campaign. Save.
   
   

Quick checklist when “nothing shows up”:

• Did you make the Advertiser first, then the Campaign? If not, fix the order.
  
  

• Are your files exactly 480×60, 300×300, or 1920×400? Re-export if they aren’t.
  
  

• Did you upload the files to the correct Campaign for that Advertiser?
  
  

• In Active Ads, did you pick the section and then the banner spot?
  
  

• If you set dates on the campaign, make sure today is inside the run window.
  
  

Copy-ready example flow:

• Advertiser: “Firstleaf Wine Club”

• Campaign: “Fall Sponsor – Oct”

• Upload: 300×300 and 480×60 (add 1920×400 if you want a top hero)

• Active Ads → choose section (e.g., Right Section) → choose banner spot → select 300×300 from that campaign → Save
  
  

Practical tips:

• Keep a folder template named exactly by size: “480x60”, “300x300”, “1920x400” so you don’t mix them up.
  
  

• When a sponsor returns next month, reuse the same Campaign and just swap the image. Your placements stay wired.
  
  

• For a clean test, assign a 300×300 to a side section and a 1920×400 to your header so you can see both in one glance.
  
  

Follow this order and size rule, and you’ll spend your time reviewing results—not hunting for a missing banner.