Why Do Envelopes Rip in Half During Shipping?

This post contains affiliate links. As an Amazon Associate, I earn from qualifying purchases at no extra cost to you. I only recommend products I personally use.

A few months ago I mailed out a multi-card order in a larger envelope, the same way I'd packed plenty of bigger orders before. A week later I got a message from the buyer with a photo attached: the envelope had arrived torn clean in half, held together by nothing but a strip of USPS tape someone at a facility had slapped on. Worse, it wasn't all there. Half of the cards in the order were simply gone, lost somewhere between my mailbox and theirs.

I figured it was a one-off. Then a few weeks later it happened to me from the other direction. I was the buyer this time, and the envelope that showed up was a repackaged envelope with the USPS logo and "WE CARE" printed on it. To translate, my order had been ripped and thrown into a new envelope, all while half of it was missing.

Two separate shipments, two separate senders, the same exact failure. That's not a coincidence. Once I started paying attention, the pattern was clear: this happens with larger envelopes carrying several cards, and it's worst when those cards are grouped together into one solid bundle.

Why Multi-Card Envelopes Are the Ones That Rip

A single toploaded card in a plain white envelope is small, light, and flexes along with the envelope. A multi-card order is a different story. Several cards in a larger envelope add real weight and rigidity, but the envelope itself is still just thin paper. As mail runs through high-speed sorting machines, gets bent around rollers, and gets compressed into trays with hundreds of other pieces, the paper wants to flex while the cards inside refuse to. All of that stress concentrates along the edges of whatever is inside, and eventually the paper gives out and tears straight across the envelope.

Team Bags and Shipping Shields Make It Worse

Here's the part that makes this failure so costly. Most of us bundle multi-card orders to keep them organized and protected: several toploaders slid into a team bag, or a stack of cards sandwiched between shipping shields. That's good practice for protecting the cards, but it turns the contents into one rigid, heavy block.

When the envelope tears in half, that block doesn't stay put. It sits entirely on one side of the tear, and with nothing holding the open end shut, the whole bundle can slide right out. That's how you end up with a buyer receiving half an envelope and half an order. The cards weren't lost one at a time; they left together, because they were packed together.

The Fix: Packing Tape Down the Length of the Envelope

The fix is simple: run a strip of packing tape along the full length of the envelope, end to end. The tape acts like a spine. Paper tears easily, but packing tape doesn't, and with a strip running across the line where the envelope wants to split, the two halves can't separate even if the paper underneath starts to give. Even in a worst case where the paper tears, the tape keeps the envelope in one piece and the cards inside it.

There's a second benefit too. Running the tape so it crosses over the flap means the envelope stays sealed. Envelope glue alone isn't always reliable, especially with the extra weight and pressure of a multi-card order pushing against the flap. The same strip of tape that stops the envelope from tearing in half also keeps it from popping open.

Since adding this step, I haven't had a multi-card envelope come back torn. It costs a few cents of tape per envelope and adds maybe ten seconds to packing. That's a small price compared to refunding half an order, or dealing with a buyer who opens their mailbox to find their cards missing.

If you ship multiple cards in larger envelopes, especially bundled in team bags or between shipping shields, make the tape part of your process before you learn this the hard way.

For the full breakdown of materials and costs for shipping a single card in a plain white envelope, our PWE shipping guide covers every step in detail.