Help please Visa Waiver

Just dug out my passport and realised that the Visa waiver stub is still attatched to my passport.[:0]
Seem to remember a thread about this but did a search and can't find it.
Anyone know how I go about getting it back and how long it takes to resolve
Thanks in anticipation
Paul
Seem to remember a thread about this but did a search and can't find it.
Anyone know how I go about getting it back and how long it takes to resolve
Thanks in anticipation
Paul