Others

How to Request a Microsoft W-9 or Proof of Insurance for Vendor Due Diligence

Algirdas JasaitisAlgirdas Jasaitis Oct 19, 2026 871 views

Question details

The user needs to obtain Microsoft's W-9 form, certificate of insurance, or other official documentation for vendor onboarding and due diligence.

How to Request a Microsoft W-9 or Proof of Insurance for Vendor Due Diligence
Product
Microsoft 365
Device & OS
not provided
Scenario
Completing vendor onboarding or due diligence requiring official tax or insurance documents from Microsoft.
Observed behavior
The user needs a standardized way to request and securely receive Microsoft's W-9 or insurance certificates through the official support channels.
Before you start

Ensure you have Microsoft 365 administrator privileges, as access to the admin center's billing and support requests is restricted to admins.

Solution 1Recommended

Request Vendor Documents via the Microsoft 365 Admin Center

The most reliable way to get the correct W-9 or specific proof of insurance is by submitting a service request to the Microsoft 365 billing team.

Because there are different types of certificates of insurance, Microsoft requires these requests to go through their billing engineers to ensure you receive the appropriate documentation for your vendor due diligence.

1
Sign in as Administrator

Navigate to the Microsoft 365 admin center and sign in with your administrator credentials.

2
Navigate to Support

Go to the 'Support' section in the left-hand navigation menu.

3
Create a Service Request

Select 'Service requests' to create a new support ticket.

4
Specify Your Needs

Describe your request, specifying whether you need a W-9 form, a certificate of insurance, or another vendor due diligence document, and submit the ticket to the billing team.

Request Vendor Documents via the Microsoft 365 Admin Center
Admin Access Required: If you do not have an administrator account, you will need to ask your organization's Microsoft 365 administrator to submit this request on your behalf.
Free Microsoft Office alternative

Manage Your Vendor Documentation with WPS Office

While Microsoft 365 handles your vendor document requests, WPS Office provides a free, lightweight, and highly compatible alternative to Microsoft Office for opening, editing, and managing all your downloaded PDFs and business documents.

  1. 1. Download the Software: Visit the official WPS website and click 'Free Download' to get the installer package.
  2. 2. Install WPS Office: Run the downloaded file and follow the straightforward on-screen instructions to install the suite on your device.
  3. 3. View and Edit Documents: Open WPS Office to effortlessly view, organize, or print your vendor due diligence files like PDFs and Word documents.
Fully compatible with Microsoft Office formats including Word, Excel, and PowerPoint.Built-in robust PDF editor to seamlessly view and manage your requested W-9 and insurance forms.Free and lightweight, requiring fewer system resources than Microsoft Office.Familiar user interface ensuring a zero-learning-curve migration for your team.
microsoft office alternative - wps office

Frequently Asked Questions

Why do I need to contact the billing team for proof of insurance?

Because there are different types of insurance certificates, the Microsoft 365 billing team needs to evaluate your specific vendor due diligence requirements to ensure they provide the correct documentation.

Can I request a Microsoft W-9 without admin access?

No, submitting a service request through the Microsoft 365 admin center requires administrator privileges. You must ask your organization's IT administrator to submit the request for you.

How do I check private messages on the Microsoft Community forum?

Sign in to the forum, click your Profile Picture at the top right, select 'My Profile', and then choose the 'Private messages' tab to view any documents sent by moderators.