Collecting Stamps

There are four methods – different shops suit different ones. Here’s a side-by-side look at each, with pros and cons.

QR Scan

Every customer has a QR code on their digital card. At checkout, they show it on their phone. A staff member scans it on the Summa scan page in their browser — the stamp lands on the card instantly. The whole process takes a few seconds.

Best for Cafés, bakeries, and any shop with staff at the counter. Especially handy when things need to move fast.
Pros
  • Fast — one scan and the stamp is there
  • Works with any smartphone
  • No accessories needed besides a phone for staff
Cons
  • Staff must actively scan on each purchase
  • Requires a device with a browser behind the counter (tablet, phone, or laptop)
Set up QR Scan →

NFC Stamp

You get a small NFC sticker and attach it to a physical stamp or keychain. At checkout, your staff holds the stamp to the customer’s phone — done. The stamp is automatically added to the customer’s card. The customer just has to hold out their phone — they don’t even need to unlock it.

Best for High-throughput counter service: cafés, bakeries, hairdressers. Especially good when checkout needs to be fast.
Pros
  • Extremely fast — under one second
  • Only authorized staff can stamp
  • The customer doesn’t have to do anything except hold out their phone
Cons
  • Some older phones may lack NFC support
  • The NFC sticker needs to be written once with an app
Set up NFC Stamp →

PIN Entry

Every customer has a four-character code on their card (e.g. "K7PX"). At checkout, the customer reads out the code. Your staff types it into the Summa scan page — the stamp is matched to the right card.

Best for Shops that want to start immediately — no accessories, no hardware, no setup needed.
Pros
  • No device or accessories needed
  • Ready instantly — just log in and go
  • Works even when NFC or camera aren’t available
Cons
  • Staff must type the code manually
  • Slightly slower than QR scan or NFC
Set up PIN Entry →

Receipt Stamp

After each sale, your POS system calls the Summa API and gets a one-time URL back. This URL is printed as a QR code on the receipt. The customer scans the QR code at home or on the go — the stamp is automatically added. Each code is single-use and expires after 48 hours.

Best for Shops with a POS system that want to fully automate the stamp process. Ideal when no staff is available for manual stamping.
Pros
  • No staff effort at point of sale — the POS handles everything
  • Customers scan the receipt at their convenience — no pressure at checkout
  • Fully automated — runs on its own after one-time setup
Cons
  • Requires one-time technical setup with your POS system (API integration)
  • The customer has to actively scan the receipt — not everyone does
Set up Receipt Stamp →