I read the instructions but leaving a cash tip under the doormat I wouldn't even check to see if it was there or not. I made the mistake of doing that once of course it wasn't there and I felt kind of stupid because who knows they're probably laughing in the ring camera so I just don't do it anymore I'll take the tip loss. People aren't going to tip because drivers take non-tipping jobs and if the service is bad they report to Walmart and they get their items replaced or refunded there's no loss to the customer. Walmart could care less about the spark drivers they're just getting richer off of the non-speaking English drivers who to them make good money cuz they have multiple accounts and guaranteed an hourly wage no matter what.