Billing software glitched and my invoice numbers got scrambled
I was sending out invoices from my truck in Denver last Tuesday when I noticed invoice #1047 went to the wrong customer because the software auto-assigned duplicate numbers after an update. The client paid the wrong amount, and I had to spend 3 hours on the phone with their accounting and my software support to untangle it. Has anyone else had a billing system silently mess up invoice sequencing, and how do you catch it before it costs you money?
Back in 2019 I had a similar mess when my old system reset its counter to 0001 on New Year's and started reusing numbers from three years prior. A client with invoice #0001 from 2016 got a fresh bill for $400 and called me thinking I was running a scam. I now print the invoice date in giant bold letters at the top just so nobody can confuse a reissued number with the old one.