We recommend placing the QR Code close to your counter and in a place visible for all of your customers.
There are multiple ways you can present it.
- As a sticker
- With a second display
- Tabledisplay like the image below (https://www.amazon.de/gp/product/B000WL0NLI/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&th=1)
- There is also the possibility for you to use nfc tags.