The Sidney Powell Georgia lawsuit contains several sworn affidavits from witnesses willing to testify, risking a felony perjury charge if they lie.
Another swore under oath:
"I witnessed two poll workers placing already separated paper machine receipt ballots with barcodes in the Trump tray, placing them in to the Biden tray. I also witnessed the same two poll workers putting the already separated paper receipt ballots in the “No Vote” and “Jorgensen” tray, and removing them and putting them inside the Biden tray, They then took out all of the ballots out of the Biden tray and stacked them on the table, writing on the count ballot sheet."
Yet another person swore that “not once did anyone verify these ballots,” and “there was no authentication process in place and no envelopes were observed or allowed to be observed.” This person added, “I saw hostility towards Republican observers but never towards Democrat observers. Both were identified by badges.”
Another affidavit read:
"I noticed that almost all of the ballots I reviewed were for Biden. Many batches went 100% for Biden. I also observed that the watermark on at least 3 ballots were solid gray instead of transparent, leading me to believe the ballot was counterfeit. I challenged this and the Elections Director said it was a legitimate ballot and was due to the use of different printers. Many ballots had markings for Biden only, and no markings on the rest of the ballot."