Blog

by Dr. Piyush Singhal

Category: Courier Bag & Mailer Guides

Date: October 3, 2026

Empty-box claims and swapped returns: how tamper-proof bags help

A customer says the parcel arrived empty. Another sends back a worn kurti in place of the new one you shipped. A third parcel comes back as RTO with the seal cut open. If you sell online in India, you have met at least one of these. Sellers often tell us about these problems when they order courier bags.

Here is the short answer. A tamper-proof courier bag helps because it shows whether the parcel was opened between your table and the customer's door. It does not prove what you put inside. To win a claim you need the bag plus a few habits: a packing video or photos with the order ID, the packed weight written down, and a proper check of every return before you accept it.

What does a tamper-evident seal actually prove?

Think of the lock on a godown shutter. A lock tells you whether someone got in. It cannot tell you what was inside to begin with.

A tamper-evident courier bag works the same way. On our tamper-proof courier bags, the adhesive strip seals permanently. If anyone opens it on the way, the bag tears and it shows.

We call these bags tamper-proof on our listing for that reason, and I would not stretch the word any further than that.

So the seal can prove two things:

The parcel was closed when it left your table.
Whether that closure was opened before it reached the customer.

It cannot prove three things:

What went inside. An empty bag seals just as neatly as a full one.
That the customer did not open it at home and then claim it was empty.
That nobody cut through the side. The seal guards the strip, not the whole film. A blade cut leaves a visible slit, which is evidence in itself, but only if someone photographs it.

I will be honest here. No bag stops fraud on its own, and ours is no exception.

We cannot fight a claim for you. What we can do is give you a bag that makes your evidence stronger. The rest of the evidence gets made on your packing table.

What do Amazon, Flipkart and Meesho ask for in a claim?

Every big marketplace has an official route for sellers when a return comes back damaged, wrong or empty.

Amazon India calls its route SAFE-T, short for Seller Assurance for E-commerce Transactions. Amazon's own seller blog for India (2018) describes it for Easy Ship sellers, covering in-transit damage and customer-damaged returns. You file it from Orders, then Manage SAFE-T Claims, with your documents attached, and only one claim is allowed per order ID.

Flipkart has the Seller Protection Fund (SPF). Its seller FAQ says you can claim within 14 days of receiving the returned product if it is damaged, defective or the wrong product. It asks for clear photos of the product from all angles, a photo of the shipping label, and a description of the problem.

Meesho handles return claims through its supplier panel, with its own rules and time limits.

The exact rules sit inside each seller panel, behind a login, and they change. We are a packaging company, not a marketplace consultant, so please read the current help page in your own panel before you depend on any number here.

One pattern holds across all of them, though. The reviewer wants evidence that ties the product to the order ID and the shipping label. A photo of a torn kurti proves damage. It does not prove which parcel it came from.

Which habits actually win return disputes?

My view is simple. Each piece of evidence covers a different gap, and none of them covers everything, which is why they work best together.

Evidence	What it shows	What it cannot show
Tamper-evident seal	The closure was intact, or it was opened	What was packed
Packing video or photos with the order ID	This product went into this parcel	What happened after pickup
Packed weight, written down	The parcel was not empty at dispatch	Which product was inside
Customer's opening video	The parcel's condition when it was opened	Anything, if the customer does not send one
Your own video of every return	What actually came back to you	What the customer did before pickup

A packing video, or photos with the order ID

This is the habit that matters most.

I would start here even before buying a better bag. Fix a phone on a stand above the table and follow the same order every time:

Print the shipping label first and show it to the camera, with the order ID readable.
Show the product: front, back, size tag, and any serial number or batch code.
Put the product into the bag in the same shot.
Peel the liner and press the strip, still in the same shot.
Show the sealed bag with the label on it, then stop recording.
Save the file with the order ID as its name.

Record one continuous clip with no cuts. An edited clip is easy to doubt.

If video feels heavy at five orders a week, photos still help: the product lying next to its printed label, then the sealed parcel with the label visible.

My advice is to keep the files longer than you think. A return can arrive weeks after dispatch, and the claim window only starts after that. I would keep them for at least 3 months (90 days).

For swapped returns, mark what is yours. A small SKU sticker on the tag, or a note of the serial number in your packing photo, lets you prove the returned item is not the one you sent.

The weight at packing

Weigh the sealed parcel and write the weight against the order ID. Better still, keep the scale display inside the video frame.

Couriers weigh parcels for their own billing too. That is why weight disputes happen at all. A parcel that left your table at 400 g and was logged by the courier at about the same weight was not empty when it left.

Weight has a limit.

A brick weighs something too. It cannot tell you whether the jeans inside were the right size, so it supports the video. It does not replace it.

Asking the customer for an opening video

For orders from your own website, Instagram or WhatsApp, write it into your return policy. Damage or missing-item claims need an unboxing video that starts with the sealed parcel. Repeat that line on the invoice or on a small card inside.

On marketplace orders, the marketplace's customer policy decides what the buyer must show. You can request a video politely, but you cannot insist on it. I know some sellers feel awkward asking. A friendly line on the thank-you card costs you nothing, and most genuine customers will not mind.

Checking returns and RTO before you accept them

RTO parcels and customer returns are where many sellers lose money quietly. The parcel comes back, someone signs, and the problem is found a week later when nobody can prove anything.

This is the routine I would follow before signing for any returned parcel:

Look at the seal strip and every side of the bag for cuts, fresh tape or a different bag.
Weigh it and compare it with your packing weight.
If anything looks wrong, photograph it with the AWB label in the frame. If the delivery person allows it, write "seal tampered" on the delivery sheet before you sign.
Open every return on video, in one take, label first.
Raise the claim inside the marketplace's window, with the video, the photos and your packing record.

Two people checking an opened parcel and recording it on a phone — Photo: Thirdman on Pexels

Why do opaque bags and the invoice jacket matter?

Our film is opaque, and opaque film hides the product. Nobody on the route can see a phone cover, a branded shirt or a perfume box through it. What people cannot see, they are less tempted to take. This one costs you nothing extra, because the film is opaque anyway.

Our bags come with an attached POD (proof of delivery) jacket, and the invoice goes in it. It travels on the outside, readable, and reaches the customer with the product. In a dispute, an invoice that matches your packing photo makes your story easier to check. On a courier bag you do not need a separate envelope. For cartons, a packing list envelope does the same job.

10x14 inch tamper-proof courier bag with the attached POD jacket holding a packing slip

Which courier bag size should I use?

We see sellers get this part wrong more often than any other.

The size matters more than people think. A bag that has to be stretched to close puts the seal under strain, and a strained seal can lift at a corner. That is a weak point in transit, and a weaker point in a dispute.

We sell 6 sizes, from 6x8 to 14x18 inches, and we print the size on our listing in inches because that is how most Indian sellers ask for it. Measure the product as it ships, folded and in its inner poly. Add its thickness plus about 1 inch to both the width and the length, and pick the first bag that covers both. Our courier bag size chart shows typical products for each size, and the courier bag size finder does the maths for you.

One more rule. The strip cannot be reopened. So fit the product first, check it, and only then peel the liner. Keep a few spare bags on the table for the day someone packs the wrong colour.

Where is a tamper-proof courier bag the wrong choice?

We make these bags from 60-micron LDPE film, as stated on the listing. They are plastic, and I will not pretend otherwise. They keep out rain, dust and prying hands. They do not cushion anything.

Glass, ceramics and books with sharp corners need cushioning or a box. We also make paper packaging at JPPL, and for small items that need padding, see our padded paper mailer packing guide. And if your brand promises plastic-free packaging, a courier bag breaks that promise, whatever it does for security.

Questions sellers ask

Can a customer open a tamper-proof bag and reseal it? Not without it showing. Once the strip is pressed, opening it tears the bag. What a customer can do is open it at home and then claim it was empty. That is exactly why the packing video matters.

Is a tamper-proof bag enough to win a marketplace claim? No. It is one piece of evidence. Claims are usually won on a packing record tied to the order ID and the label, with the seal and the weight supporting it.

Should replacements go in a fresh bag? Yes, always. I would film it exactly like the first one. A replacement in a fresh sealed bag gives you a clean record if the second parcel is also disputed, and we sell these bags partly for this use.

If you want to feel the bag before you buy a pack, our free sample listing includes a courier bag variant, listed at Rs 0. Pack one real order with it on video this week. You will know in ten minutes whether the routine fits your table.