Follow the tip through checkout
A typical digital flow starts after staff build the order and before checkout is completed. The customer reviews the order, sees the available tip choices, selects a preset or custom amount or declines, and confirms the transaction through the supported payment flow. The POS stores the tip as part of the order record while keeping it distinguishable from merchandise or service sales.
Current Square documentation shows configurable preset percentages, smart amounts, custom tips, calculation before or after tax, and tip prompts that can appear before payment or on a separate screen. Current Shopify POS documentation shows up to three preset choices, an optional custom amount, a no-tip choice, and a prompt tied to supported in-person credit-card workflows. These are product examples, not universal rules.
Staff should avoid describing one provider's sequence as the standard for every terminal. Before rollout, test the configured register, customer-facing display, reader, receipt printer, and each intended tender type.