What do you do when a customer goes radio silence when their bill is due?

Been there. What's helped me is looking at a client's payment history before assuming the worst — some clients are just slow but always come through, others are actual risk signals. I built a small read-only tool for Jobber (staycovered.ca) that looks at each client's past payment behavior and flags which outstanding invoices are genuinely likely to be a problem versus just running late as usual. Not a professional dev, just built it for my own use with AI tools. Happy to share more if it'd help anyone else dealing with this.