Confirm there are not already settings or features that do what the shop is asking for. There is currently no native feature that enforces a global, cross-channel purchase limit per customer account across both web and mobile app platforms.

What does the shop want the product to do? Per-Customer Historical Limits: Allow Shop to set a hard limit (e.g., maximum 2 units) for a specific product SKU per individual customer account.

Why/how would it improve sales or efficiency? Prevents Scalping & Reselling: Ensures high-demand, limited-edition, or heavily discounted items are distributed fairly among genuine retail customers rather than bought in bulk by resellers or bots.