Enclose small styrofoam cube in your letters to qualify for parcel-rate discounts on confirmed delivery service

The Indiana Election Division sends its notices out with a small styrofoam cube in the envelope; the cube increases the envelope's thickness to 3/4", so it qualifies for discounted parcel-rate shipping.

The Styrofoam cube enclosed in this envelope is being included by the sender to meet a United States Postal Service regulation. This regulation requires a first class letter or flat using the Delivery or Signature Confirmation service to become a parcel and that it "is in a box or, if not in a box, is more than 3/4 of an inch thick at its thickest point." The cube has no other purpose and may be disposed of upon opening this correspondence.
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