CHICAGO–MILWAUKEE SERVICE CORRIDOR
(773) 835-5323
Guardian Filter Service

GUARDIAN FILTER SERVICE

Secure Supplier Document Route

Controlled process for exchanging supplier-qualification documents with Guardian Filter Service.

CONTROLLED DOCUMENTS

Request an invitation first.

Do not send certificates, tax forms, credentials, banking information, or confidential documents through the public inquiry form.

  1. Email Operations & Product Development from a verifiable business domain.
  2. Guardian confirms the purpose, organization, and minimum document set.
  3. Guardian issues authorized transfer instructions for that exchange.
  4. Both parties record receipt, review, expiration, and disposition.
Request secure invitation ↗
01

Minimum necessary scope

Only documents required for qualification, commercial authorization, and operations.

02

No public documents

The public inquiry does not accept files or financial information.

03

Expiration control

Certificates and authorizations are reviewed against applicable dates and requirements.