How do you certify documents as an investigator?

To certify documents as an investigator, writing "certified to be a true copy" is the appropriate method. This phrase indicates that the individual has verified the document against the original and confirms its accuracy. Certification is a formal process that ensures the integrity and authenticity of the document being submitted. By using this specific wording, the investigator affirms that they have taken responsibility for the accuracy and have conducted the necessary verification.

In contrast, simply signing a document does not inherently validate its content or confirm authenticity; it merely indicates agreement or acknowledgment. Stamping with an official seal can be part of the certification process but is not the sole method of certifying a document, as the seal must accompany a declaration of truthfulness. Lastly, having a witness sign does not certify the document either; it only provides additional verification of the signing event rather than the accuracy of the content itself. Thus, the most precise way to certify documents is by stating "certified to be a true copy."