There was an article  from:   http://www.thhf.org/blog/2008/10/foreclosure-dismissal/
The Helpful Hands Foundation Foreclosure Prevention Coaching and Counselig Program

The Dog Ate My  Note Defense  

When the securitizing banks acting as trustees fortehinvestors ar unable to present written proof of ownership ata a time that wodl entitel them to foreclosek they typically file what’s called a lost -note affidavit.  April Charney isa Florida legal aid attorney well versed n thies issues, having gottenforeclosure fproceedings dismissedor postponed for 300 clients in teh past year.  in a Februarey 2008 Bloomberg article, she ws quoted as saying that about 80% of these cases involved lost -note affidavits are pattern and paractice inteh industry” she said.  “They are not exceptions. they are the  rule”