Automatically remind clients about unpaid invoices by email and text

Automatically emails and texts clients about unpaid invoices on a schedule, and stops once they pay.

How the work actually flows

It repeats. Checks status again next day; runs once per each unpaid invoice.

Pattern: Structured Loop (21) ยท Multiple Instances without Synchronization (12)

flowchart TD trig(["runs on a daily schedule"]):::trigtime s0[["check payment status"]]:::mi s1["send reminder email"]:::svc s2["send firmer reminder and text"]:::svc s3["send final notice"]:::svc trig --> s0 s0 --> s1 s2 --> s3 lp{"invoice paid or cycle ends"}:::gate s1 --> lp lp -. "checks status again next day" .-> s0 lp -->|"finished"| s2 out[/"invoices paid or reminders exhausted"/]:::out pay{{"consistent payment follow-up without manual chasing"}}:::pay s3 --> out out --> pay classDef task fill:#e7f6fe,stroke:#34b8f0,color:#2c2a29 classDef svc fill:#f6f8fa,stroke:#7c8795,color:#2c2a29 classDef mi fill:#e7f6fe,stroke:#0079a8,color:#2c2a29,stroke-width:2px classDef human fill:#fff,stroke:#0079a8,color:#0079a8 classDef store fill:#f6f8fa,stroke:#0079a8,color:#2c2a29 classDef trig fill:#00a4eb,stroke:#0079a8,color:#fff,font-weight:bold classDef trigtime fill:#00a4eb,stroke:#0079a8,color:#fff,font-weight:bold classDef trigdata fill:#8ad4f5,stroke:#0079a8,color:#06314c,font-weight:bold classDef gate fill:#fff,stroke:#e8a23d,color:#6b4708,font-weight:bold classDef out fill:#1f9d6b,stroke:#167a53,color:#fff,font-weight:bold classDef pay fill:#06314c,stroke:#021f33,color:#fff
Starts itAn outside serviceRuns once per itemRepeat or finishResultPayoff
Build size
Advanced

A larger build with multiple systems, AI reasoning, and custom rules.

Business functions
Voice & PhoneEmail AutomationImage & Media ProcessingSpreadsheet & Database OpsSurvey & FeedbackScheduling & CalendarFinance & Accounting
Connects
GmailGoogle SheetsTwilio

The problem it solves

Chasing unpaid invoices eats into your week, and it is easy to forget who still owes you money. You do not want to nag clients who have already paid, but tracking payment status by hand is tedious and error-prone. Late payments hurt your cash flow when there is no consistent follow-up system.

Who it fits

Small business owners or freelancers who invoice clients and need consistent, non-awkward payment follow-up.

How it works

  1. Invoice details are entered in a spreadsheet
  2. System checks payment status each day
  3. Friendly reminder email is sent a week after the invoice date
  4. Firmer reminder and text message follow if still unpaid
  5. Final notice is sent before the reminder cycle closes
What you get

Overdue invoices that get chased without you asking

Your clients get scheduled email and text reminders about unpaid invoices, and the reminders stop the moment they pay.

What you get

A sequence of reminder emails and texts sent automatically until each invoice is paid or the cycle ends.

What you need

A Gmail account, a Google Sheets spreadsheet, and a Twilio account for text messages.

We can build this. But should you?

The hard question is not how to build it. It is whether this is the right thing to build first.

That is what a Fractional Chief AI Officer figures out with you, before anyone writes a line of code.

Let's Talk Strategy

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