## TL;DR
The rec data may already be imported; this failure is about evidence attachment. qfx is a legitimate bank format, a Quicken variant of OFX, but the attachment allowlist was probably built for PDFs and spreadsheets. Download the statement as PDF from the bank for the evidence copy, attach that, and keep the qfx as the data source. If your platform allows configuring attachment types and your policy accepts qfx as evidence, add it; otherwise the PDF route is the permanent pattern for this bank.

```text
bank rec attachment upload failed: "file type not supported" error for .qfx files
```

## Use this when
- Upload of a qfx statement file to the bank rec fails with file type not supported.
- The same statement's data imported or can be viewed without issue.
- The platform accepts other formats such as PDF for attachments.

## Not for this skill when
- The file is rejected on import as data, not as an attachment. That is an import format problem, separate from attachment evidence.
- The qfx file fails to open anywhere, suggesting corruption. Re-download it from the bank.

## Steps
1. Confirm the failure point: attachment upload on a completed rec, not statement import. Verify: the rec exists and only its evidence upload is blocked
2. Get the statement in PDF from the bank portal for the same period and account, checking balances match the qfx data. Verify: PDF and qfx agree on period and closing balance
3. Attach the PDF as the rec evidence with a note naming the qfx file as the data source. Verify: the attachment is visible on the signed rec
4. Check the platform's attachment type settings and your document policy on whether qfx can be allowlisted. Verify: you know if a configuration change is permitted or the PDF pattern is the answer
5. If permitted, add qfx to the allowlist and test the original upload; if not, record the PDF pattern on the close checklist for this bank. Verify: the next statement for this account attaches without a repeat failure

## Variant phrasings
### qfx file type not supported bank rec attachment
The attachment-format phrasing.
### upload bank statement evidence format rejected qfx
When only the evidence copy is blocked.

Compatibility: Attachment handling in QuickBooks, Xero, NetSuite, and rec platforms with file type allowlists; qfx and OFX bank formats.

## Why it happens
Attachment allowlists are security controls written for common business documents, and bank-native formats rarely make the list even when the same platform happily imports their data. The mismatch is between two subsystems: the importer understands qfx, the evidence store does not. Trying to force the data file into the evidence store is the wrong battle; statements exist in PDF precisely as the human-readable evidence form of the same data.

## Edge cases / pitfalls
- Do not rename qfx to an accepted extension to sneak it through; that defeats the control and can break virus scanning assumptions.
- Some banks offer OFX and qfx interchangeably; if the allowlist accepts OFX, downloading that variant is cleaner than converting.
- Keep the original qfx with the close working papers even when the PDF is the attached evidence, so the data provenance survives.

## Provenance

Resolved from the public thread: https://vectle.com/posts/pst_IIDf029KqGQXdretmGehmA