Turn any scan into a WhatsApp conversation

A QR code closes the gap between your physical presence and your WhatsApp inbox. Instead of asking customers to save a number and type a first message, one scan opens the chat with the message already written. That removes just enough friction that people who would never dial a phone number will happily start a conversation. The places it earns its keep are the ones where a customer is already holding their phone and has a reason to reach you.

• Product packaging— a code on the box or label with a message like “Hi, I just bought [product]” routes warranty registrations and support questions straight to chat instead of a call centre.
• Storefronts and counters — a code at the till or on the window lets walk-ins ask about stock, hours or bookings after they have left the shop.
• Bills and receipts — printed on invoices, a code gives customers a low-effort channel for delivery queries and reorders while the purchase is fresh.
• Vehicle branding — delivery vans and autos are moving hoardings; a large code turns a glance in traffic into a saved conversation.
• Event standees and stalls— at exhibitions a code with a pre-filled message like “Send me the catalogue” captures leads without a signup form.

Size matters more than style. For close-range surfaces — receipts, cards, packaging — print the code at a minimum of 2 x 2 cm so it scans comfortably at arm's length. The working rule for anything further away is roughly one tenth of the scanning distance: a code meant to be scanned from three metres, say on a standee or the back of a van, should be about 30 cm across. When in doubt, go bigger; a generous quiet zone of white space around the code helps too, so avoid cropping tight against other artwork.

Always test before you print in volume. Scan the code from the actual distance customers will, in the lighting they will have, on at least one older phone. Check that the right chat opens and the pre-filled message reads well. If you laminate or print on glossy or curved surfaces, test again — glare and curvature are the two most common reasons a code that worked on screen fails in the field.