Do not open your door to the driver but instead make it clear when you place an order where your parcel can be safely left.
Leave a tip if you can. Many drivers are on low wages and will only get statutory sick pay if they fall ill. Ideally, tip electronically online, in the app you ordered. from or over the phone, to avoid the risk of contamination via notes and coins.
Wash your hands before opening goods, then dispose of packaging and wash again.
If you are able to express your gratitude to your driver from a safe distance, do. Small gestures matter.
How to Safely Grocery Shop and Handle Shopping During the Pandemic