Send context-aware follow-up emails for overdue invoices

The system checks overdue invoices, reads recent client emails, and sends a tailored follow-up automatically.

How the work actually flows

It branches. Exactly one path is taken; runs once per each overdue invoice.

Pattern: Multiple Instances without Synchronization (12) · Exclusive Choice (4)

flowchart TD trig(["scheduled invoice check runs"]):::trigtime s0[["check overdue invoices"]]:::mi s1[("read email history with client")]:::store s2["ai evaluates need for followup"]:::svc trig --> s0 s0 --> s1 s1 --> s2 gx{"× does invoice need followup"}:::gate s2 --> gx p00["draft tailored follow-up email"]:::task gx -->|"followup needed"| p00 p10["skip this invoice"]:::task gx -->|"no followup needed"| p10 p00 --> out p10 --> out out[/"tailored follow-up drafted per invoice"/]:::out pay{{"overdue invoices chased without manual tracking"}}:::pay 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 itemA record or sheetOne path onlyResultPayoff
Build size
Advanced

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

Business functions
Email AutomationImage & Media ProcessingSpreadsheet & Database OpsFinance & Accounting
Connects
Google SheetsGmailOpenAI
Featured in

The problem it solves

Chasing overdue invoices is awkward and easy to put off, especially when you're not sure if you already followed up recently. Sending the same generic reminder regardless of context can feel tone-deaf if a client just emailed you. You want reminders that go out on schedule without tracking every invoice by hand.

Who it fits

Best for freelancers, agencies, and small businesses managing client invoicing.

How it works

  1. On a schedule, the system checks your invoice spreadsheet for overdue payments
  2. It identifies invoices that are 7, 14, 21, or 28 days overdue
  3. It reads recent email history with that client
  4. AI decides whether a follow-up is needed and adapts the message to the conversation
  5. An approved follow-up email is drafted for the client
What you get

Overdue invoices that get chased consistently

Overdue clients receive a tailored follow-up email drafted for you based on their invoice and recent conversation.

What you get

A drafted, context-aware follow-up email for each overdue invoice that needs one.

What you need

A Google Sheets account, a Gmail account, and an OpenAI API key.

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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