# Failure to Recognise

Upon upload, the AI will try to detect the kind of document and match it to an open collection.

When using either the [Bulk Upload](https://docs.zipwire.io/zipwire-collect/bulk-upload) feature or when sending via WhatsApp, Zipwire Collect relies on just the AI to determine what a file or photo contains. If it fails to recognise the doc, then it defaults to a type "Unknown" and will not be matched to a collection.

### Give it a hint

When using the **Pick file** action for the item within a collection request on the **Open** tab, the AI will be told to expect a document of the type being asked for, like a hint.

If it cannot determine it from looking at the image and text, Zipwire assumes the user has, for example, picked a passport file for the passport item.

In other words, for tricky files, use the **Pick file** button on the collection itself.

[what-the-respondent-sees-at-their-end](https://docs.zipwire.io/zipwire-collect/what-the-respondent-sees-at-their-end "mention")