Those interested scan the QR code, fill out the form, receive the SMS or WhatsApp with the coupon and when they come to the store at the time of payment they will tell you the code they received. You will mark it as used and voilà, the lead is yours
If you run a restaurant, a very interesting idea is digital menus , which you can always create with Smshosting. Use the landing page to insert the menu and then at the end offer a discount in exchange for contact.
Alternative strategies
form on the website or landing page, we point out 3 other
business owner phone numbers list possibilities, which in some cases could be very interesting.

Smshosting App . Download the free app, open the registration form and voilà, collect contacts in the store with one click in exchange for a discount coupon, a loyalty card or content of their interest.
Often proposing these incentives verbally is more effective than via the web

Download the free App for Android
Download the free App for iOS

Opt-in via SMS: what is it? If you've never heard of this "thing", it's simpler than you think

When a user sends an SMS to a specific number, writing in the text a keyword that you decide, such as: SCONTOSUBITO, you will find the mobile number of this user in your Smshosting address book. All this thanks to an automatic process .
So, once you have configured this operation, you can simply create a poster to hang in the shop window or in frequented places, which encourages your target to send the SMS to the specific number, in exchange for a discount or content.