Authenticity determination of electronic evidence is a core challenge in judicial practice. Courts must comprehensively assess the integrity of hardware and software systems involved in generating, storing, and transmitting electronic data, as well as whether the data has been properly preserved.

When submitting electronic evidence, parties should preserve the original medium. For WeChat chat records, it is best to provide the original phone and demonstrate the login process on site. Screenshots alone may face authenticity challenges if the opposing party disputes them.

Preservation measures are crucial for the admissibility of electronic evidence. Parties should apply for court-ordered preservation or notarized preservation of key electronic evidence before or during litigation.

For electronic contracts, the party claiming contract formation should submit the complete electronic contract text and the digital signature certificate. Digital signatures certified by third-party certification providers serve as preliminary evidence of authenticity.

电子证据的原件认定规则有其特殊性。电子数据的制作者制作的与原件一致的副本，或者直接来源于电子数据的打印件或其他可显示、识别的输出介质，视为电子数据的原件。因此，从原始数据中打印输出的纸质版电子证据，在法院审查中可以被认定为原件。