Authorization Requests and Fraud Rules

CodingStripeLast reported April 2025Low Frequency
Reported
1× across candidate reports
First seen
April 2025
Last reported
April 2025
Reported outcome
unknown

Problem Overview

Stripe accepts payments on behalf of merchants. Payments begin as Authorization Requests representing an intent to transfer funds from a user's credit card to a merchant. The system receives these requests and decides an outcome for each. Part 1 – Report Parser: Authorization Requests arrive as CSV lines in the…

  • 2 candidate-reported follow-ups — the exact probes interviewers asked, with the trigger for each
  • The rest of the problem statement — full requirements, constraints, and edge cases
  • Approach and trade-offs — what passing candidates did, and the mistakes that sink people
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Verified Source
Every question is reconstructed from multiple independent candidate reports. Verbatim follow-ups, not invented ones.
Codex Fact-Checked
Technical claims, formulas, and scale numbers are reviewed against primary sources.
Interviewer Follow-ups
The exact follow-ups reported by candidates, with the trigger that prompts each one — plus the mistakes that sink people.
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