Four U-shaped slits cut into the paper of recent self-adhesive Machins. Designed to tear the stamp if removed from the envelope paper--to prevent re-use. I don't have a picture to include.
I should mention, besides the U-shaped slits, there are other security features: elliptical die cuts at the sides and the iridescent "Royal Mail" overprint (best seen on the red stamp above). Those features are designed to deter counterfeits.
Soaking a self-adhesive stamp doesn't seem to smart to me.
If they arrive uncancelled, I tease off the paper on the back and re-use with a bit of glue. I guess they get through to the destination because my solicitor still writes to me. Maybe the postage due charges will all go on the final bill?
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Posted 09/21/2017 6:23 pm
