Invoice Chaser
Legal and finance skill, available on Zeplik
Invoice Chaser is a ready-to-run legal and finance skill on Zeplik. Drafts reminder emails matched to each customer's payment history and tone, gentle to firm. Ask in plain language and Zeplik applies the skill's method for you inside the conversation, on whichever AI model you prefer.
The Invoice Chaser skill loads automatically when your request matches it, or you can invoke it directly by typing /invoice-chase in any chat. It works with attachments, connectors, and any model that supports the task, so you get the same expert method every time without setting anything up.
What the Invoice Chaser skill can do
- Pull overdue invoices from QuickBooks and Stripe AR aging reports
- Cross-reference PayPal settlements to flag possibly-paid customers
- Score each customer's payment history and match reminder tone accordingly
- Draft gentle-to-firm reminder emails and queue or send only after approval
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How the Invoice Chaser skill works
Invoice Chase
Quick start
Pull the AR aging report, score each customer by payment history, draft a tone-matched reminder for each overdue invoice, and present them to the owner. Nothing sends until the owner says so.
User: "who owes me money"
→ Pull AR aging from QuickBooks
→ Cross-reference PayPal settlements (last 14 days)
→ Score each customer: good-payer / occasionally-late / repeat-late
→ Draft tone-matched reminders
→ Show summary table + drafts. Wait for "send these."
Setup (first run only)
Ask the owner two questions before running for the first time:
- Mail connector: "Do you use Gmail or Apple Mail for drafts?" — store the answer; use it for all non-PayPal draft queuing.
- Stripe: "Do you use Stripe for invoicing? I can include Stripe invoices in the overdue sweep." — if yes, pull Stripe overdue invoices alongside QuickBooks.
Do not ask again on subsequent runs.
Workflow
-
Pull overdue receivables. Query QuickBooks AR aging for all invoices more than 1 day past due. If Stripe is enabled (owner confirmed at setup), also pull Stripe overdue invoices.
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Cross-reference payment history. For each overdue customer, query PayPal for settled transactions using these parameters:
transaction_status: S(settled only — filters out pending and denied transactions that inflate result size and increase rate-limit risk)- Date window: last 7 days ending today (not 14 or 30 — wider windows are the primary cause of PayPal 429 rate limit errors)
If PayPal returns a 429 rate limit error:
- Retry once immediately with a 3-day window instead.
- If the retry also returns 429, skip the PayPal cross-reference entirely for this run. Flag all customers in the batch as "PayPal unavailable — verify manually" in the summary table. Proceed to scoring using QuickBooks history only. Do not silently drop the caveat.
If a customer shows a settled payment within the query window, flag as "possibly paid — verify" and exclude from the draft queue.
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Score each customer. Read reference/tone-matching.md for scoring logic. Result:
good-payer,occasionally-late, orrepeat-late. -
Draft reminder emails. One email per customer — consolidate multiple overdue invoices into one email. Match tone to score. See reference/examples/gentle-reminder.md and reference/examples/firm-reminder.md.
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Present drafts to owner. Show a summary table first:
Customer Amount Due Days Late Tone Send via Acme Corp $1,200 18 days Gentle PayPal Smith LLC $450 47 days Firm Gmail draft Then show each draft email in full. Wait for owner to say "send these" or approve individually.
-
Send or queue — only after approval.
- PayPal invoices: send the reminder via PayPal.
- Non-PayPal invoices: queue as a draft in the owner's configured mail app.
- Never send without explicit approval.
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Report what happened. List what was sent, what was queued as draft, and what was flagged (possibly paid, excluded).
Approval gates
- Never send or queue a draft without explicit owner approval. Present all drafts first; wait for the go-ahead.
- Never include a customer who paid in the last 14 days. Flag as "possibly paid — verify" instead.
- Never send to a customer not in the QuickBooks AR report (or Stripe, if enabled). No reminders from memory alone.
- One approval covers one batch. Adding a customer or changing a draft after approval starts a new round.
Reference
- reference/tone-matching.md — scoring logic, tone guidelines, subject line formulas
- reference/gotchas.md — known failure modes
- reference/examples/gentle-reminder.md — good-payer email example
- reference/examples/firm-reminder.md — repeat-late-payer email example
Zeplik output presentation
Present the final deliverable as a single polished artifact: clear headings, tables where the content is tabular, fenced code where it is code. Lead with the deliverable itself; keep process commentary to a single short line. If the skill produced multiple files or sections, end with a compact list of them with one-line purposes.
How to use the Invoice Chaser skill
Sign in to Zeplik
Create a free Zeplik account or sign in. New accounts start with free credits, so you can try the Invoice Chaser skill right away.
Describe your legal and finance task
Ask in plain language, or type /invoice-chase to invoke the skill directly. Zeplik recognizes the Invoice Chaser skill and applies its method.
Review and refine the result
Zeplik returns a clear, structured answer. Ask follow-ups in the same chat to refine it or take the next step.
Source and credit
- Author
- Anthropic
- License
- Apache-2.0
Adapted from the open-source anthropics/knowledge-work-plugins project and tuned to run natively on Zeplik. View source on GitHub.
Frequently asked questions
- What is the Invoice Chaser skill?
- Invoice Chaser is a ready-to-run legal and finance skill on Zeplik. Drafts reminder emails matched to each customer's payment history and tone, gentle to firm. Ask in plain language and Zeplik applies the skill's method for you inside the conversation, on whichever AI model you prefer.
- How do I use Invoice Chaser on Zeplik?
- Sign in to Zeplik and ask in plain language, or type /invoice-chase in any chat to invoke it directly. The skill applies its method and returns a result you can refine in the same conversation.
- Which AI model does the Invoice Chaser skill use?
- Any model you choose. Zeplik works across every model in one chat, so the Invoice Chaser skill runs on your preferred model for the task.
- Where does the Invoice Chaser skill come from?
- The Invoice Chaser skill is adapted from the open-source anthropics/knowledge-work-plugins project (Apache-2.0) and tuned to run natively on Zeplik. The original source is linked on this page.
- How much does the Invoice Chaser skill cost?
- Using the skill is free to start. You only spend Zeplik credits when the assistant runs, and new accounts begin with free credits.
Related legal and finance skills
- Account ReconciliationUse when the user asks to reconcile accounts -- "bank rec for June", "GL to subledger reconciliation", "intercompany rec", "find the reconciling items". Compares GL balances to subledgers, bank statements, or third-party data and categorizes differences.
- Audit SupportUse when the user is preparing for an internal or external audit -- "get ready for the auditors", "build testing workpapers", "select audit samples", "classify this control deficiency". SOX 404 control testing methodology and documentation standards. Not for running a SOX testing cycle (use sox-testing).
- Cash Flow SnapshotUse when the user asks about cash flow or runway -- "forecast my cash flow", "will I make payroll", "how long is my runway", "cash crunch coming". Builds a 30/60/90-day cash forecast with confidence bands and named risk flags from books data or CSV, plus a downloadable XLSX.
- Cash-Flow Heads UpA forward-looking 30/60-day cash outlook flagging the tightest week and two things to act on. Not for reconciling and closing the books (use close-month or month-end-prep).
- Compliance CheckUse when the user asks whether a feature, campaign, or initiative is compliant -- "compliance check this launch", "does this touch GDPR or personal data", "what approvals do we need before shipping". Surfaces applicable regulations, required approvals, jurisdictional requirements, and risk areas.
- Contract ReviewUse when the user asks to review a contract -- "review this MSA", "redline this vendor agreement", "what's risky in this contract". Clause-by-clause analysis against a negotiation playbook with redlines, business impact, and fallback positions. Not for quick NDA screening (use triage-nda).
More on Zeplik
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