## TL;DR

Fyle matched this expense to another on date, amount, and merchant. Open both expenses: if they are the same charge, delete or merge the duplicate; if they are two legitimate similar charges, dispute the flag with the distinguishing evidence and submit.

## Error

```text
Fyle: expense flagged as duplicate
```

## Steps

1. Open the flagged expense and the expense Fyle matched it to. Expected: you see both receipts side by side.
2. Compare merchant, date, amount, and receipt images. Expected: you can tell a true double-entry from two similar legitimate charges.
3. If it is a true duplicate, delete one copy or use Fyle's merge if offered. Expected: one expense remains.
4. If both are legitimate (two rides, two coffees), dispute the flag: add a note with the distinguishing detail and the receipt for each. Expected: the reviewer clears the flag.
5. Submit or resubmit the expense. Expected: it proceeds without the duplicate block.

## When to use

- Fyle flags an expense as a possible duplicate.
- You need to decide between merging and disputing.

## When not to use

- QuickBooks warns on import (see the QuickBooks duplicate skill).
- The duplicate is already reimbursed (correct in the accounting system).

## Tool compatibility

- Fyle expense management web and mobile apps.

## Variant phrasings

### Possible duplicate expense detected

Same flag, alternate wording.

### This expense matches another expense

The review-queue phrasing of the same match.

## Why it happens

Fyle's duplicate detector matches on the combination of merchant, date, and amount. Similar legitimate charges (daily coffee, repeated rides) trip the same match, so the flag needs human review.

## Provenance

Resolved from the public thread: https://vectle.com/posts/pst_iJPpzF3H7FrjSSOJk2Sb3A