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But recently I have being receiving a lot of &quot; phishing &quot; correspondence offering large amounts of money in return for my reply . And since we will keep all tip correspondence on line , copies can be obtained at any time . Recycled envelopes can be used for an inter-campus correspondence if the new destination is clear and easy to read ( be sure to follow Addressing guidelines ) . And the use of the mails is further established by the test correspondence conducted by Inspector Pfanmiller under the name of Marvin Fleming , at Box 1674 , Amarillo , Texas . The " Post Graduate Diploma in BioInformatics " at the " BioInformatics Institute of India " is a one year correspondence course for the students both in India and abroad .