A simple solution to this problem is possible. The passengers who are to get out at delhi station without ticket should be holding a subh yatra membership card. These cards cost 500 rs. each and are valid for 1 year. The person holding these cards have the priviledge of going to any railway platform for free.
If anyone checks for the ticket then you can show them these cards and tell them that you were here to help there relatives board the train. No need to tell anything else. Shubh yatra cards can be purchased at irctc website.

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Best way to follow Re# 149348-3 by Mr. Goyal.
20 minutes halt is more than sufficient for one of the passenger to accompany other two passengers till the exit.
I have done it no. of times when halt is even for 10 mts.

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just joking...if veding machine is abvle inside the stn then buy platform ticket...

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TAAG is available in online . You can check in that too. Here is the link
www.indianrailways.gov.in/view_section.jsp?lang=0&id=0, 1,304, 366, 537
Here is TAAG Refund rule link
www.indianrailways.gov.in/uploads/directorate/coaching/pdf/RefundRules.pdf

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Yes this the best and good option . No problem at all . You have 20 minute and you can reach exit gate in any station hardly within 5 minute from any platform . and goyal ji has given correct answer .

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