What's the best way to handle residents who consistently pay maintenance late?

We have a handful of flats that are 2-3 months behind on maintenance every cycle. Right now our committee just sends reminder messages manually, which takes forever and doesn't seem to change anything. Has anyone set up automated reminders or late fees in AMS? Curious what's actually worked for other societies without causing friction with residents.

We turned on automated reminders 3 days before and 3 days after the due date — cut our late payments by more than half within two cycles. We also added a small late fee after 15 days, which is configurable per society in the billing settings. Residents respond much better to an automatic system reminder than a committee member personally chasing them, it takes the awkwardness out of it.