I also work at an e-discovery company and can confirm the use of TIFF files as the court-admissible format for producing any sort of document (especially if it

I also work at an e-discovery company and can confirm the use of TIFF files as the court-admissible format for producing any sort of document (especially if it has redactions). Here is an example of the process to apply redactions to a PDF file (or any sort of electronic document). The document is opened in a third-party native viewer with redaction capabilities (and not in the original application like Arcobat or Office). The end-user draws a black box over the appropriate text using the third-party native viewer. This redaction is saved as a separate layer that can be rendered on top of the native document when viewed in the software, as well as printed out. Finally, when documents need to be produced for court, they are printed out to a TIFF-printer driver, effectively converting them to TIFF and "burning in" the redaction layer. The TIFFs are delivered to the courts and opposing council.