Step 5: Upload associate documents

Once associates have been added, you must upload their required identity and address verification documents.

Document uploads are completed using secure pre-signed URLs generated by Sokin.

POST
/corporates/associates/documents

What this step does

This endpoint:

Validates the associateId

Determines required documents based on the assigned due diligence model

Generates secure, time-limited upload URLs

Prepares the documents for compliance review

All uploaded documents are reviewed as part of Sokin’s compliance process.
The onboarding application cannot proceed until required documents are uploaded.

What you need before calling this endpoint

Ensure you have:

A valid associateId returned when the associate was created

The document details you intend to upload (ID type, address proof type, file format)

Each request must be linked to a valid associateId.

Successful response

On success, the API returns:

A confirmation of success

A presignedResponse containing upload URL details

These pre-signed URLs are used to upload the files externally.

Store the response details securely. If a URL expires, you must request a new one.

How pre-signed URLs work

Each generated URL:

Remains valid for 10 minutes

Allows a single file upload

Overwrites the previous file if reused

Accepts files up to 20 MB

Supports PDF and image formats

If the selected ID type only requires a single document (for example, Passport), the response will include a pre-signed URL for the required file type only.

Please review the detailed guide on how to upload documents via presigned URLs.

Important considerations

Documents must be uploaded using the returned URLs.

Expired URLs cannot be reused.

All required associate documents must be uploaded before the onboarding request can be finalised.

Document requirements vary depending on the assigned due diligence model and ownership structure.

What this step does — and does not do

At this stage:

Associate documents are securely stored

The application will not proceed to review until:

All required associate documents are uploaded

Any required corporate or parent entity documents are submitted

The onboarding request is finalised

Next steps

After uploading all required associate documents:

Upload corporate documents

Upload parent entity documents (if applicable)

Finalise the onboarding request

Refer to:

Corporate document uploads

Parent entity document uploads

Finalise onboarding guide

Step 5: Upload associate documents

What this step does#

What you need before calling this endpoint#

Successful response#

How pre-signed URLs work#

Important considerations#

What this step does — and does not do#