I have heard from contemporary spiritualists that Karma is actually stored in one's body, in different layers.

There are three types of Karma

 1. Prarabdha Karma
 2. Sanchita Karma       
 3. Agami Karma  

Now leaving out Agami Karma which happens in future.

There are three types of bodies or Shareeras

1. Sthoola Shareera  
2. Sookshma or Linga Shareera
3. Karana Shareera


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Now its said that Sanchita Karma is stored in Karana Shareera and Prarabdha Karma is stored in Sookshma Shareera.

Can any one please give scriptural backing for this by giving appropriate verses