Fastfail

Fastfail is a pre-verification step that quickly evaluates whether a submitted document is suitable for further verification, allowing the system to provide immediate feedback and, in rare cases, avoid unnecessary processing.

Instead of running full verification immediately, the system performs a set of automatic checks in advance to filter out clearly unsuitable inputs. This helps your applicants quickly identify issues and fix them before continuing with the full verification flow.

When a document is uploaded to Sumsub, the system runs a set of initial checks to detect the following:

All pages and sides of the document are uploaded.
The uploaded images represent a valid document (not a non-document image).
The same side of the document is not submitted twice.
Document number, name fields, and MRZ are present, clearly visible, and can be recognized.
Document image is not a screenshot or a printout.
Image has not been cropped.
Document is not considered expired or issued in the forbidden territory in accordance with the settings.
Photo in the document contains the human face.
Image metadata does not indicate the use of prohibited editing software.

If the Fastfail check is not passed, the system notifies the applicant and requests a new document upload.

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Important
Fastfail does not replace full verification and is designed to detect only obvious issues. It does not perform detailed quality checks, which are handled at later stages of the verification process. Passing Fastfail does not guarantee final approval.

Error rejection tags

Errors do not let applicants proceed with verification using the presented document.

Tag	Description
`forbiddenDocument`	Unsupported or unacceptable type/country of the document.
`missingImportantInfo`	Some of the required document data is missing or cannot be read.
`dataNotReadable`	Data on the image is missing or cannot be read.
`expiredDoc`	Document is expired.
`documentWayTooMuchOutside`	Some parts of the document are cropped.
`noIdDocFacePhoto`	Face is not clearly visible on the document.
`screenshot`	Provided image is a screenshot.
`sameSides`	Image of the same side of the document was uploaded as front and back sides.
`shouldBeMrzDocument`	Provided document type should have an MRZ, but there is no readable MRZ on the image.
`shouldBeDoubleSided`	Sides of the document should be provided.
`shouldBeDoublePaged`	Full double-page photo of the document (usually, two main passport pages) is required.
`documentDeclinedBefore`	Same image was uploaded earlier by the same applicant and declined by the system.
`mrzNotReadable`	We could not extract the MRZ code from the uploaded document. This may happen due to a variety of reasons, such as poor image quality or some corners of the document missing, which may include the MRZ area.
`docExpiresSoon`	The submitted document is about to expire in N months. This is defined by the Minimum residual validity of ID document setting in the Dashboard.
`missingDob`	The document does not contain the owner's date of birth.
`incompleteDob`	The document does not contain the full date of birth (day, month, and year).

Warning rejection tags

Warnings let applicants proceed with verification after retaking the document photo and providing missing information.

Tag	Description
`badSelfie`	Face or the photo in the document is not clearly visible.
`dataReadability`	Information in the document cannot be read.
`inconsistentDocument`	Uploaded photos do not belong to the same document.
`maybeExpiredDoc`	Document may be expired.
`documentTooMuchOutside`	Document is not fully in the frame.

Updated 13 days ago