u/Exciting-Drama-6270

Hi everyone,

I am mapping out a communication system that connects User A (caller) with User B (receiver) through a central system.

System requirements:

• The system must connect User A directly to User B via phone.
• User B negotiates the transaction details directly with User A on the call.
• No escrow or upfront billing is handled during the initial connection.

The problem:
I need to audit this logic for vulnerabilities. Specifically, how to prevent off-system transactions where users take the conversation offline to bypass system tracking.

I have attached two routing options I designed.

Questions:

1. Which workflow design is more resilient against off-system bypass?
2. What technical triggers (e.g., call tracking, masking) should be included to flag suspicious routing behavior?

Looking for feedback purely on the architecture and system logic. Thank you!

Hi. I’m launching a business and have a question about the best communication setup to choose. We operate by referring the client directly to the worker; the worker then speaks with the client and agrees on the price. Our firm doesn't take any upfront payments; instead, we collect our fee only after the client has paid the worker for the job. I want to avoid fraud—specifically, situations where workers or call center staff might cheat me. I’d appreciate any ideas, feedback, or tips you might have.

I attached two options that I came up with.