Postal Explorer > IMM Issue 34 - International Mail Manual > 2 Conditions for Mailing > 270 Free Matter for the Blind or Other PhysicallyHandicapped Persons > 274 Mail Preparation
See 122.
First-Class Mail International accepted as free matter must be marked “Free Matter for the Blind or Handicapped” in the upper right-hand corner of the address side of the mailpiece.
Matter for the blind must not be sealed, even if registered.
Matter for the blind is subject to postal inspection (see ASM 274), and must be prepared in such a way that the contents are protected but inspection of the contents is not hindered.
The items must be placed in wrappers, in rolls, between cardboard, or in bags, boxes, unsealed envelopes, or containers. Dangerous fasteners may not be used. The articles may also be tied with string or twine in a manner that will permit them to be easily untied.