Restaurants have different pickup arrangements, so the collection point for online orders may vary. If you're unsure where to go, ask a restaurant staff member where you can collect your online order.
Your order should be under the name shown in your receipt email (or under the phone number at some restaurants). If asked, show the restaurant staff your receipt email.
Before leaving, check your order. If something is wrong, let the restaurant staff know so they can help resolve the issue.