The Handle, Not the Door: Auditing the QR Codes Your Charity Leaves in the World

There is a laminated sign in a café window near us that has been asking for help for eleven months. It is a good sign, in most respects: warm photography, plain English, a clear ask. And in the bottom corner, four centimetres of QR code, printed slightly too close to the edge and now curling away from the glass.

I have tried to scan it four times. Twice it was behind a reflection of the sky. Once my phone found it and offered me a phone number, which is a strange thing to be offered by a picture. Once it worked, took me to a JustGiving page, and asked me to log in.

That sign is not unusual. It is the norm. Which is a shame, because a well-made QR code is genuinely a lovely bit of design — a door handle between the physical world and your donation page. The trouble is that most charity print treats it as a door. Handles invite. Doors with no handles are just walls with a rectangle on them.

A handle has to be reachable, first of all

Start with the body, not the technology. Walk up to your poster, tin, leaflet stand or shop window and stand where a real person would stand.

• Height. For anything on a wall, aim for somewhere between roughly 90cm and 140cm from the floor. Below that, you are asking wheelchair users and shorter volunteers to perform a small act of faith. Above that, you are designing for basketball players.
• Size and distance. A decent working rule is that the code should be about one tenth of the distance it is meant to be scanned from. A code scanned from a metre away wants to be roughly 10cm across. Our café window code was designed for a phone held at arm's length from a pavement two steps back. It never had a chance.
• Light. Glass is a trap. Afternoon sun, a bright internal light, or a shiny laminate will all blow out a code. Test in the worst light your object will actually meet, not the best.
• Contrast and quiet. Keep a clear margin of plain colour around the code. Do not put it on a photograph. Do not put it on your brand's mid-tone teal. Black on white still wins, and this is not the place to be adventurous.
• Error correction. When you generate the code, use a higher error-correction level. It is invisible to the user and it means a scuff, a sticker or a rained-on corner does not break the whole thing.

Say what is behind the door

A bare QR code is a locked box. Nobody owes it their trust or their time. People scan with a purpose, and they need that purpose confirmed before they lift the phone.

So: label it. "Scan to donate £5", "Scan for our opening hours", "Scan to see what we do with your donation". Better still, put the destination underneath as a plain web address, and make it short enough to type. If the address is a 74-character tracking link, you have replaced a door handle with a maze.

It also helps to say what happens next. Money? Time? A form? An email list you will never leave? A sentence like "two taps, no account needed" does more for conversion than a redesign of the button ever will.

Trust is a design material

People are, reasonably, wary. A QR code that resolves to a shortened link on a domain nobody recognises is a phishing-education poster, not a donation poster. Two fixes, and they are not technical:

1. Link to your own domain wherever possible. A redirect from a short, branded URL on your own site is fine and readable. A random shortener is not.
2. Be honest about data. If the destination page uses cookies or asks for details, say so on the print or in the first line of the page. Nobody minds being told; everybody minds being surprised.

One more thing, and it is the sort of thing that quietly costs you money: send the scan somewhere fast. A donation page that takes nine seconds to load on mobile data has a QR code that says "we did not think about you". Test it on a cheap Android phone with a cracked screen, not the studio's newest handset.

Never only a code

This is the part we would put in bold if the format allowed it. A QR code is not an accessible alternative to anything. Screen readers cannot scan. People with low vision, limited dexterity, or no data plan cannot scan. Some people simply will not, and that is a legitimate choice, not a failure to be designed around.

Every physical-to-digital moment needs two or three other routes:

• A printed short URL in text large enough to read.
• A phone number for anyone who would rather talk to a human, staffed or signposted honestly.
• A text-to-donate number or an envelope, if money is the ask.
• For anything time-sensitive, a person — a volunteer or staff member briefed to help.

If your poster cannot be understood and acted on without a working smartphone, it is not accessible, however crisp the code.

The quiet test

Before you send anything to print, do this. Print it. Stick it up in the actual place. Then hand a cheap phone to someone who has never seen the design and ask them to get where the poster is asking them to go, in the rain, holding a coffee, without explanation.

Count the seconds. Count the attempts. Note where their thumb goes first. Notice whether they even try, or whether they read the plain web address underneath instead — which happens more often than the analytics will ever tell you, because typed visits do not show up as scans.

Then fix the size, move it up, kill the photograph behind it, shorten the URL, add a phone number, and print it again.

Print spec, in short

For our own projects, the QR page in the brand kit now says: minimum 3cm for close work, one tenth of viewing distance for anything at range, black on white with a clear margin, high error correction, branded short URL, one honest line of context, plain URL underneath, a non-digital fallback, and a test on a bad phone before sign-off.

None of that is clever. That is the point. The cleverness of a QR code — invented in 1994 by a Japanese car-parts company to track components, of all things — is that it disappears into use. A handle should never be the interesting part of a door.

Your tin, your window, your leaflet stand: they are out there right now, in the weather, asking. Give the people who walk past them a handle that turns, and a route in for everyone who would rather knock.