A popular tactic of criminals is the "fake order" scam. The way it works is that you get a message, usually in email or text, that appears to be a routine confirmation for an order. Of course, you never ordered whatever product or service it's confirming. The message looks common enough, and it says that money will be charged to your credit card or withdrawn from your bank account for the ...

Find out how to submit a request for a refund for a purchase of digital Xbox content.

Learn how to use mobile operator billing as a payment option to buy Xbox subscriptions, games, and other content.

Xbox Support ... Xbox Support

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

Find out how to manage your Xbox subscriptions to request a refund or cancel a recurring payment.

連絡 Microsoft 支援服務。尋找常見問題的解決方案，或向支援專員尋求協助。

If you already had a Microsoft 365 subscription and did not purchase it from the iOS app, you can manage it at: https://account.microsoft.com/services If you ...

Find solutions for Xbox account and profile issues, manage settings, and get support for your Xbox experience.

Certificate authority (CA) A certificate authority is an entity similar to a notary public. It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired. Top of Page Digital signature assurances The following terms and definitions show what assurances are provided by digital signatures. Authenticity The signer is ...