http://www.dcf.state.vt.us/fsd/policy/PDFs/appendix5.pdf

http://law.utoledo.edu/students/clinics/OfficeProcedures.htm
A new Case File contains 4 legal sized folders (Client Matters--paper
fasteners on right and left sides, Correspondence--paper fastener on right
side only), Pleadings--paper fastener on right side only, Research--paper
fastener on right side only). During the course of the semester, all
letters, and memos should be placed in the correspondence file, in reverse
chronological order. All pleadings, and other court papers, should be placed
in the pleadings file, also in reverse chronological order.

http://www.ucc.ie/en/npec/meeting/DocumentFile,37543,en.doc
1.      Correspondence

This section should contain the following:

·        Referral Letters

·        Discharge Communication

·        Ambulance Transfer Sheets

·        Other correspondence relevant to the patient's care

Filing should be in reverse chronological order, i.e. the latest
correspondence to the front.

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Reverse chronological order is logical; why would you want to travel over
history when usually it is the last correspondence you are asked to take
action on.

--
Don
Vancouver, USA