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How to scan trade show attendance

Registered is not the same as attended. Scanning badges at the door gives you a real count of who came, when they arrived and who never showed, and it is the number sponsors, exhibitors and the venue ask for. This guide covers what the badge needs, how to run the desk, what to do with walk-ins, and how to read the results.

Updated October 16, 2026 · 6 minute read

Why scan attendance at all

A regional show with 300 registrations typically sees 55 to 75 percent of them walk through the door. If you only know the registration number, you cannot tell an exhibitor how many people were actually on the floor, you cannot settle a sponsor report, and you cannot show the venue a headcount if they ask. Scanning turns the roster into three honest numbers: checked in, walk-ins, and no shows.

The same scan also feeds everything downstream. A badge that has been scanned at the door is a badge an exhibitor can scan at the booth, and an attendee who checked in at 9:40 is someone whose arrival you can see in the day.

What the badge needs

Attendance scanning only needs one thing on the badge: a code that maps to one person on your list. A QR code is the right choice for a regional show. It prints on any label or card stock, reads from a phone camera in under a second, and tolerates a crease.

Three ways to run the desk

1. Staffed desk with a phone or iPad

A staffer greets, scans or searches by name, confirms, hands over the badge. One person handles 120 to 180 arrivals an hour on a steady morning. Two staffers cover the opening rush at most shows under 600 people.

2. Self service kiosk

An iPad on a stand in kiosk mode. The attendee scans the QR code from their confirmation email or types their name, and the badge prints. Keep one staffer within reach for the people who registered under a colleague's email.

3. Pre-printed badges on a table

Badges laid out alphabetically, picked up by the attendee. Fast, but attendance is only recorded if someone scans the badge as it is picked up. Without that scan you are back to guessing.

Whatever the format, the scan is the record. If a badge changes hands without a scan, that person is a no show in your data.

Walk-ins

Every show gets them: the colleague who tagged along, the local who saw the banner, the exhibitor's customer. Plan for 5 to 15 percent of your checked in count to be people who were not on the list that morning. The desk needs to add a name, company and email in under a minute and print a badge with a working code on the spot, so the walk-in can be scanned at booths like everyone else.

A small label printer at the desk handles this. Brother QL series printers are the common choice because they print one badge in about two seconds and hold a roll of 400 labels.

Reading the numbers

NumberHow it is countedWho asks for it
Checked inAttendees with at least one scan at the doorExhibitors, sponsors, the venue
Walk-insChecked in attendees added on the dayYour marketing team, next year's budget
Not checked inRoster minus checked in, while the show is liveDesk staff watching for late arrivals
No showsNot checked in, once the scan window closesExhibitors comparing promised and actual attendance
Arrival patternCheck-in timestamps by hourDesk staffing, opening keynote timing

Keep "not checked in" and "no show" separate while the show is running. At 10 a.m. a missing attendee is late; a week later they did not come. Reports that call everyone a no show on the morning of the show cause arguments with sponsors.

After the show, export the full roster with a check-in status and timestamp per person. That one file answers the exhibitor who wants to know whether their invited customers came, the sponsor who wants verified attendance, and your own question about whether the 8 a.m. opening was worth it.

Privacy

An attendance scan records that a person arrived and when. Keep that data with the registration list under the same retention rule, tell attendees in the registration terms that badges are scanned for check-in and by exhibitors, and give exhibitors only what the attendee agreed to share. In the EU and UK, treat the badge scan at a booth as the attendee's consent to share their details with that exhibitor, and say so on the badge or at the desk.

A desk checklist

ScanDeck Check-In runs the desk on an iPad or iPhone, with a browser version at checkin.scandeckapp.com for Android tablets and laptops. It scans or searches attendees, prints badges on a Brother QL-820NWB as people arrive, adds walk-ins on the spot, and shows checked in, walk-in and not checked in counts live in the organizer dashboard. The roster export includes check-in status and no shows once the scan window closes. The same badge codes work in the exhibitors' ScanDeck Lead Capture app, so one badge serves the door and every booth.

Attendance scanning questions

What percentage of registrations actually attend a trade show?

For regional and association shows with free or low cost registration, 55 to 75 percent is typical. Paid registration and shorter lead times push the number up. Scanning at the door is the only way to know your own figure.

Do I need special hardware to scan attendance?

No. A phone or iPad camera reads a QR code. The only extra is a label printer at the desk if you want to print badges for walk-ins or print on demand instead of pre-printing.

How do I handle someone who registered but has no confirmation email?

Search by name or company at the desk, confirm who they are, check them in and print their badge. The check-in app should make name search as fast as a scan.

Can exhibitors scan the same badge for leads?

Yes, if the door and the booths use the same system. With ScanDeck the badge printed at check-in is the badge exhibitors scan with the Lead Capture app, so there is one code and one attendee list.

When does "not checked in" become a no show?

When the scan window closes after the show. Until then a missing attendee may still arrive. ScanDeck labels them not checked in while the event is live and no show once the window ends.

What does attendance scanning cost with ScanDeck?

It is part of the per event price. The free test event includes check-in, badge printing and lead capture; paid events start at $299 with no per badge or per scan fees. See the pricing page.

Run a sample check-in desk in the demo.

The demo loads a sample show with a roster and printable badges. No signup, no credit card, no download.