bill of sale

Discussions on WindowsForum.com about the bill of sale often arise when users need to prove legitimate software ownership to Microsoft. In one example, a user who performed a clean install of Windows 7 Ultimate encountered a 'not genuine' warning and was asked by Microsoft to submit their product key sticker, Certificate of Authenticity, DVD, and bill of sale for verification. This highlights how the bill of sale serves as critical evidence in counterfeit software claims, helping Microsoft determine if a user was sold illegitimate copies. The tag reflects real-world scenarios where documentation is required to resolve activation or licensing issues.