{"id":"sales-freelancer-late-payment-reminder","audience":"freelancers","category":"sales-work","technique":"tone","track":"sales","level":"beginner","title":"Write a firm, friendly reminder for a late freelance invoice","free":false,"task":"Write a payment reminder email to a client whose invoice is 14 days late. Plain text, under 90 words, subject line first. Include the invoice number, the amount, the original due date and the late fee exactly as the contract states, with the total shown as a sum. Be firm but friendly, with no threats of legal action. Ask for payment by Nov 20.","materialLabel":"Invoice and contract terms (attached to your prompt automatically)","material":"Freelancer: Tomás Rivera (web developer). Client: Cedric at Hartwell Dental.\n\nInvoice #2026-031: $2,800 for website build, issued Oct 5, due Oct 23 (net 18).\nToday: Nov 6. Not paid.\n\nContract clause 7: \"Invoices unpaid more than 10 days after the due date incur a one-time late fee of 5% of the invoice amount.\" (Not charged yet.)\n\nHistory: Cedric paid a deposit on time. Last email from Cedric (Oct 28): \"Sorry, accounting got behind. Will send soon.\"\nPayment methods: bank transfer (details on invoice) or card link.\n\nTomás's note: don't mention suing, collections or taking down the website. He wants to keep the relationship.","rules":[{"type":"maxWords","max":90},{"type":"plainText"}],"mistakes":[{"title":"Skipping the late fee math","why":"The AI mentions a late fee without the numbers or leaves it out.","fix":"Add: \"Show the fee and total as a sum.\"","checks":["r1"]},{"title":"Threatening tone","why":"The AI adds 'further action' language.","fix":"Add: \"Firm but friendly; no threats of legal action or collections.\"","checks":["r2"]},{"title":"Missing details","why":"The AI leaves out the invoice number or the due date.","fix":"Add: \"Include invoice number, amount and original due date.\"","checks":["r0"]},{"title":"Too long","why":"The AI writes a long formatted email.","fix":"Add: \"Plain text under 90 words.\"","checks":["maxWords","plainText"]}],"promptHints":[{"label":"Lists invoice details","patterns":["invoice (number|#)","due date","amount"]},{"label":"Shows late fee math","patterns":["late fee","5%","sum","total"]},{"label":"Sets the tone","patterns":["firm","friendly"]},{"label":"Bans threats","patterns":["no threat","legal","collections"]},{"label":"Sets deadline and form","patterns":["nov(ember)? 20","plain text","subject"]}],"hint":"Ask for the exact details, the fee math, the deadline and the tone.","rubricLabels":["Line 1 starts with \"Subject:\" and the body names invoice #2026-031, $2,800 and the original due date of Oct 23","Shows the late fee as 5% of $2,800 = $140 and the total as 2,800 + 140 = $2,940","Asks for payment by Nov 20 in a friendly tone, with no mention of legal action, collections or the website being taken down"]}