PS Form 3600-EZ (PS3600EZ, PS3600-EZ, PS 3600EZ, PS 3600-EZ) USPS US Postal Service (Fillable) Postage Statement First-Class Mail Easy Nonautomation Letters, Cards or Flats Delivered in a fully-calculating, saveable, fill-in PDF format so you can complete your form quickly and accurately. Th...