Your Dash Cam Caught It, but the WhatsApp Forward Is Not the Evidence: Preserving Footage Under BSA Section 63 (India 2026)

The moment another vehicle hits yours, two clocks start. The first is inside the dash cam: loop recording is already filling the card, and at some point it will write over the oldest minutes, which may include the ones that matter. The second clock is slower and easier to miss. Every time the footage is forwarded, trimmed or re-saved, it drifts further from the file the camera actually wrote, and that original file is what Indian evidence law now asks you to vouch for.

This guide is about the second clock. If you want to know whether your camera can read a number plate at night, our piece on why night and monsoon footage fails covers that. Here we assume the camera caught something useful, and the question is how to keep it usable if the matter reaches a court.

This is not legal advice. We sell and fit dash cams at our JC Road counter in Bengaluru. We are not advocates. What follows is the text of the law, quoted from the Gazette of India, and practical steps that keep your options open. If your case is going to court, show this to your advocate, not the other way round.

What does the law actually ask for?

Since 1 July 2024, electronic evidence in India is governed by the Bharatiya Sakshya Adhiniyam, 2023 (BSA), which replaced the Indian Evidence Act, 1872. The old Section 65B certificate that lawyers talk about is now Section 63.

Section 63(1) says that information in an electronic record, including anything "stored, recorded or copied in optical or magnetic media or semiconductor memory", is treated as a document and "shall be admissible in any proceedings, without further proof or production of the original" if the conditions in the section are met. A dash cam's microSD card is semiconductor memory, so the footage falls squarely inside this wording.

The conditions in Section 63(2), paraphrased for a car owner, are:

• the device was in regular use for the activity (a camera that records every drive qualifies more naturally than one you switched on once);
• information of that kind was regularly fed into it;
• it was "operating properly" through the relevant period, or any fault did not affect the record;
• the record reproduces what was fed in during that ordinary use.

Section 63(4) is where the certificate comes in. It must be "submitted along with the electronic record at each instance where it is being submitted for admission", and it must be signed by "a person in charge of the computer or communication device" and "an expert". For your own dash cam, the person in charge is usually you. The Act does not say in Section 63 who the expert must be; Section 39(2) separately makes the opinion of an Examiner of Electronic Evidence under Section 79A of the IT Act a relevant fact. Who will sign Part B for a private car owner is a question for your advocate.

The certificate itself is printed in the Schedule to the Act. Part A is filled by the party. Among other things it asks for the device's make, model and serial number, and this line:

"I state that the HASH value/s of the electronic/digital record/s is _________________, obtained through the following algorithm:" followed by SHA1, SHA256, MD5 or another legally acceptable standard, with "(Hash report to be enclosed with the certificate)".

That hash line is the most practical part of the whole section for a car owner, and almost nobody explains it.

The hash test: why the WhatsApp copy is a different file

A hash is a fingerprint calculated from every bit of a file. Change one bit and the fingerprint changes completely. Copy the file exactly and the fingerprint stays identical. That is why the certificate asks for it: it lets anyone check later that the file in court is the same file you described.

We did not want to state this from theory, so we ran it. We made a five-second test video named the way dash cams name clips, copied it to a second file, and separately re-encoded it to a smaller, lower-resolution version, which is broadly what happens when a messaging app compresses a video before sending. Then we calculated SHA-256 hashes on a Mac:

$ shasum -a 256 NO20260929-101500-000123F.MP4 copy_to_laptop.MP4 whatsapp_style.mp4
653d48c08b2887539c75cb107c184bc50235810e8862e9fe6b5326b2e06c83ed  NO20260929-101500-000123F.MP4
653d48c08b2887539c75cb107c184bc50235810e8862e9fe6b5326b2e06c83ed  copy_to_laptop.MP4
ca3ee219aeb487f67ec079739f9fcb754c5e0137da40b55f6786a92748c8f8b4  whatsapp_style.mp4

The straight copy matches the original exactly. The re-encoded version, which was about a quarter of the size, does not match at all. It still looks like the same video to a human. To the certificate, it is a different record.

So the order matters. Preserve the original, hash it, and only then make copies to share. A clip that has been forwarded, trimmed in the camera app or screen-recorded off your phone can still be useful to show a police officer or an insurance surveyor, but it cannot carry the fingerprint of what the camera wrote.

On Windows, the equivalent command is certutil -hashfile <filename> SHA256, documented by Microsoft. Both tools are built in. Neither needs anything installed.

The first hour, in order

Safety and the people involved come first. Everything below happens once the scene is safe.

1. Stop the overwrite. If the impact did not trigger the camera's emergency lock, press the lock or emergency button if it has one. Then, when you can, switch the camera off and take the card out. A camera left running, including in parking mode, keeps writing to the same card. If you need to keep recording on the drive home, put a spare card in.
2. Do not format, delete or trim anything on the card or in the app. Not even the clips you think are irrelevant.
3. Copy the whole card, not just the clip. On a laptop, copy every folder exactly as it is, with original file names. Dash cams record in short segments, and many keep normal and event clips in separate folders, so the minutes before the impact may not be in the event folder at all. Those earlier segments show how it happened.
4. Hash the originals straight away. Run the command above on the key files on the card and on your copy. Save the output as a text file. Note the date and time, because the Schedule asks for both in IST and 24-hour format.
5. Check the camera clock against your phone. If the camera time is wrong, do not correct it yet. Write down the difference, for example "camera shows 10:15, phone shows 10:22". Changing settings after the incident invites questions you do not want.
6. Share copies, never the card. If someone needs the video now, send a copy. On WhatsApp, send it as a Document rather than as a video, which is widely reported to skip the app's video compression. Better still, share a file link. You can check any copy yourself: hash it on the receiving side, and if it matches your original, nothing changed.
7. Keep the card in your custody. Put it in an envelope, write the date, time and what it is, and sign across the seal. If police take the card, ask for a written receipt that names it.

What the new primary-evidence rules change

The BSA added language the old Act did not have. Section 57 defines primary evidence, and its new Explanations fit dash cams closely:

Explanation 4: "Where an electronic or digital record is created or stored, and such storage occurs simultaneously or sequentially in multiple files, each such file is primary evidence."

Explanation 5: "Where an electronic or digital record is produced from proper custody, such electronic and digital record is primary evidence unless it is disputed."

Read against a dash cam, Explanation 4 appears to cover the way loop recording splits a drive into sequential files. Explanation 5 is the reason step 7 above matters. "Proper custody" is something you can show only if you did not hand the card around.

There is also Supreme Court reasoning from the old law. In Arjun Panditrao Khotkar v Kailash Kushanrao Gorantyal (14 July 2020), a three-judge bench said the certificate "is unnecessary if the original document itself is produced", which "can be done by the owner of a laptop computer, a computer tablet or even a mobile phone, by stepping into the witness box and proving that the concerned device, on which the original information is first stored, is owned and/or operated by him."

We want to be careful here. That judgment interpreted Section 65B of the old Act. How courts apply it and the new Explanations to Section 63 is still being worked out, and we have not found a settled answer to cite. What is clear is that keeping the original card untouched keeps both routes open: producing the original, or certifying a copy with a hash that matches it. Once the original is gone, only the second route is left, and it depends on a hash you may never have recorded.

One transitional point. Section 170(2) says proceedings already pending when the BSA came into force continue under the Indian Evidence Act. If your matter started before 1 July 2024, your advocate may be working with Section 65B instead.

Small things that quietly weaken footage

• A wrong clock. Section 63(2) asks whether the device was operating properly. A camera that is still set to its factory date gives the other side an easy question. Check the time on your camera once a month.
• A dying card. A card that has silently stopped recording gives you nothing to preserve. Our guide to why dash cam memory cards fail explains how to catch that early.
• Trimming in the app. Most camera apps let you cut a clip and save it to your phone. That creates a new file. Use it for sharing if you like, but keep the untrimmed original.
• Relying on the event folder alone. The lock protects the clip around the impact. It does not protect the approach, which is often what decides who was at fault.
• Keeping the camera only in the car. If the car is stolen or towed, so is the evidence. Our piece on dash cams and car theft covers why local storage has limits.

What the camera can and cannot do for you

No camera makes footage admissible by itself. That depends on the conditions and the certificate. A camera can make your job easier in three ways.

A reliable emergency lock keeps the impact clip from being overwritten. Our Blaupunkt BP DC 7080 (Rs.12,999) lists exactly that behaviour, and it also records the cabin, which helps when the question is what the driver was doing.

GPS logging records location and speed alongside the video, which answers two questions that come up in almost every dispute. The 70mai A810 (Rs.18,599) has GPS built in. Whether GPS data sits inside the video file or in a separate file varies by camera, which is one more reason to copy the whole card.

Regular, everyday recording fits the "used regularly" condition better than a camera you switch on for long trips. A hardwired install that starts with the ignition does that without you thinking about it. The full range is in our cameras collection.

We do not sell memory cards, so buy a spare high-endurance card from a source you trust and keep it in the glovebox. It is the cheapest part of this whole plan. If your camera is already fitted and you are not sure whether its clock, lock button or parking mode are set up properly, bring the car to the counter and we will check it with you.

Sources

• The Bharatiya Sakshya Adhiniyam, 2023 (No. 47 of 2023), Gazette of India Extraordinary, 25 December 2023, Sections 39, 57, 63, 170 and the Schedule: egazette.gov.in
• Commencement from 1 July 2024, notification S.O. 849(E): Taxmann summary
• Arjun Panditrao Khotkar v Kailash Kushanrao Gorantyal, Supreme Court of India, 14 July 2020: Indian Kanoon
• certutil -hashfile, Microsoft Learn: learn.microsoft.com

Last fact-checked 29 September 2026. This article explains the law in general terms and is not legal advice. For a specific case, consult an advocate.