Share via

Request Proof for Tax Residency

Susana Wikho Ng 0 Reputation points Microsoft Employee
2026-04-08T10:11:23.2533333+00:00

Hi,

I need to request a Corporate Certificate of Tax Residence and Bank Account Confirmation Letter for Xandr Inc / Microsoft Advertising.

This is required for vendor accreditation with GroupM Spain for withholding tax treaty purposes.

Details: Country requesting: Spain Tax

Year: 2025/2026

Purpose: Vendor onboarding / AP setup

Format required: Signed PDF

Please confirm the invoicing Microsoft legal entity used for Xandr billing and provide the applicable Tax Residency Certificate.

Thanks, Susana

Microsoft Advertising | Billing and payments | Billing queries
0 comments
Answer accepted by question author
  1. MS Advertising - Vahid 260 Reputation points Microsoft External Staff Moderator
    2026-04-08T10:30:25.7866667+00:00

    Hello Susana,

    Thank you for using our Microsoft Advertising Learn Q&A Platform! 

    I understand that you require a Tax Residency Certificate. I have provided the 2026 form by sending you a private message. You can check your private messages by clicking on "View messages" at the top of the page.

    User's image

    Please note that tax or VAT requirements depend on your business location, which is the country/region where your business is legally registered. (If you are an agency, it is the country/region where your client's business is legally registered.) You can select your billing location from the list on the help pages below to find specific tax information.

    Tax or VAT information

    Microsoft Advertising cannot provide guidance on tax or VAT. Please contact your tax advisor or local tax office if you have questions.

    Microsoft Advertising is required to collect value-added tax (VAT) in certain countries/regions, and so all advertisers must provide the business location for each of their accounts. All Microsoft Advertising customers need to have a business location listed for each of their accounts. Business location is the country/region where the advertiser's business is legally registered. Whether you will be charged VAT on your advertising costs will depend on your business location and your tax registration status. For example, if you are in a business location that has VAT accounting obligations, you will need to enter your VAT registration number. If you do not provide your VAT registration number, Microsoft Advertising will charge VAT, in most cases. VAT will be charged based on your local rate. For more specific details and steps, kindly check the help page below:

    Why we need your business location (and maybe VAT information)

    Our support teams are happy to discuss your account in more detail via phone, chat or email to provide review assistance, please see our support page to reach out! 

    I hope the information provided here will at least partly answer your question.  If you have any additional questions please do not hesitate to reach out to our support. I have also sent you a private message asking for further details. You are more than welcome to respond to me if you have anything else to discuss.

     

    Kind regards, 

    Vahid | Microsoft Advertising Support Specialist | 800-518-5689

    0 comments

1 additional answer

Sort by: Most helpful
Most helpful Newest Oldest
  1. Q&A Assist
    2026-04-08T10:11:39.21+00:00
    AI generated content. This question contains an answer created with AI from Q&A Assist. Learn more

    For Microsoft Advertising in Spain, the Microsoft legal entity and VAT details provided for tax reporting are:

    Microsoft Ireland Operations Limited
    One Microsoft Place
    South County Business Park
    Leopardstown
    Dublin 18, Ireland
    VAT ID: IE8256796U

    This entity applies for partners based in Spain for VAT reporting purposes.

    For a signed PDF Corporate Certificate of Tax Residence and any bank account confirmation letter for vendor onboarding/AP setup, these documents are not publicly downloadable. To obtain them for 2025/2026 and for GroupM Spain’s withholding tax treaty requirements, submit an official support/service request to Microsoft so that a billing or support engineer can provide the certificates directly and securely.

    If the request is being made through a Microsoft partner or marketplace relationship, ensure the tax profile and payout/tax information are correctly set up, as Microsoft uses the tax profile documentation to comply with withholding and reporting requirements.

    References:

    0 comments

Your answer

Answers can be marked as 'Accepted' by the question author and 'Recommended' by moderators, which helps users know the answer solved the author's problem.