First-time day at Navan

Fix review holds on hotel deposits without weakening fraud detection

Published Oct 28, 2026

You’re the ai / ml engineer. Your team is in the room.

The setting

's runs in the cloud. It covers travel policies, approvals, and bookings of hotels, flights, cars and rail.

Hotel deposits are being treated like risky new-card activity after the booking behavior changed.

Fast hotel confirmation protects traveler plans, while payment controls still need to catch emerging card fraud.

Who you’d be doing this for

“My travelers have a confirmation, then they’re asking why the hotel still hasn’t been paid.”

Navin Joshi · Corporate Travel Manager · a character in this brief

Manages a global travel program whose travelers rely on corporate cards for booked hotel stays.

What is at stake

Corporate-card hotel deposits now send 8.4% of legitimate payments to review. You must lower the holds without opening a new fraud-loss path.

Why it isn’t already fixed

Every obvious fix costs something else. That’s the part you’d have to decide.

  • hotel confirmation speed vs fraud-loss protection
  • narrower thresholds vs emerging-pattern coverage
  • queue relief vs model reliability
  • booking signals vs payment-event timing

Why Navan

Corporate-card hotel deposits sit directly between a managed booking confirmation and a traveler’s ability to keep the reservation.

Written with these in mind

fraud ML engineerapplied data scientistrisk modeling specialist

Not your kind of problem? 61 more at Navan, or browse every organization.

Where the organization context comes fromThe postings this brief was written from, and the reporting read before it.

The organization context comes from public information. The situation and characters are written for the brief.

Job postings it was written from

Public descriptions of the work at Navan. They are listed as sources, not as openings. The lines under a posting are its own words, where it meets this brief.

This is the setup. The work is inside.

Running it puts you in the room: the full situation and its constraints, stakeholders who push back in their own words, and the decisions that are yours to make. What you produce becomes a Day One Plan — work you can show someone instead of describing.

Other live briefs connected to this one, and what connects them.

Similar problems at other organizations

Like this one, each of these is about money moving incorrectly, late, or twice.

The same setting, from another role

Each is set around Navan’s Corporate Travel Management Platform, written for a different role. They’re separate briefs, not the same scenario.

Other problems with a similar purpose

In each of these, as in this one, the aim is to make complex payment systems feel dependable in the exact real-world moment someone needs to complete one.