Do you need tabbing (wafer sealing)?
According to the USPS Quick Service Guide 201B, letter-size mailpieces that are not in envelopes "must be secured (tabbed) to prevent an open edge from jamming high-speed processing equipment. Standards for tabbing are based on basis weight of paper stock used and the location of the folded or bound edge. As an alternative to tabs or wafer seals, the open edge of the length of the mailpiece may be continuously glued or spot glued. Continuous glue or spot glue is permissible with single-sheet self-mailers and postcards."
The standard tabs we use are white or translucent. If you need another option, let us know!
One tab: For automated standard letter-size mail printed on at least 28 lb paper, the Post Office requires that there be one tab applied to the opening at the top.
Two tabs: If the opening is at the bottom of the piece or the paper weight is less than 28 lbs the Post Office requires two tabs.
One, two or maybe even three: For unique shaped material the requirements vary. Contact us or visit this link at the USPS for more information.