We do not currently support or have an integration with the Shopify in-store POS but you may receive in-store donations at your own discretion.
Our recommendation would be to only do in-store from time to time. Unlike eCommerce it may cause customer and staff fatigue and friction at the POS.
If you choose to enable in-store please ensure you notify our support team. They will need to contact you on a monthly basis to confirm how many donations you have received for the previous month. We will record this along with all pay-it-forward donations that you receive online.
Please note that we do also have an integration with eftpos provider Windcave, that would provide a pay-it-forward solution for any stores using Windcave.