30-day money-back guarantee on all digital products. No questions asked.

To request a refund: email support@sigmafoundry.io with your Gumroad order number. Refunds are processed within 1 business day of request. You will receive confirmation from Gumroad once the refund is issued (allow 3–5 business days for the credit to appear on your statement).

Custom services (AI Workflow Automation, Custom Prompt Systems, etc.) are governed by the scope agreement established at project kickoff. Services where delivery has been completed are non-refundable unless otherwise agreed in writing.

Instant delivery for all digital products via Gumroad. After purchase, Gumroad sends a download email to the address you used at checkout. Downloads are available from your Gumroad library at any time.

Format: PDF (all products unless otherwise noted on the product page). Compatible with any device that opens PDFs — phone, tablet, laptop. No special software required beyond a PDF reader.

Custom services: delivery timelines are confirmed at project kickoff and included in your scope agreement.

Email: support@sigmafoundry.io

Response time: 2 business days (Monday–Friday, US Eastern time). We typically respond faster — this is our committed maximum.

For download or access issues, include your Gumroad order number. For product questions, describe what you're trying to accomplish and which product you purchased. We do not offer phone or live chat support.

Framework and methodology products (prompt libraries, copywriting systems, toolkits) are designed to be platform-agnostic. They work with ChatGPT, Claude, Gemini, and most LLMs. We update these when the underlying methodology changes, not when individual AI tool interfaces update.

Time-sensitive products (the Tax Windfall Playbook, any legal compliance-adjacent frameworks) note their applicable period on the product page. We recommend checking the product page for the current version before relying on time-sensitive guidance.

If you purchased a product that received a major update after your purchase date, email support@sigmafoundry.io — we will provide the updated version at no charge.

All products are available for purchase worldwide. Prices are in USD. Gumroad handles currency conversion and any applicable VAT/GST collection based on your location.

Tax guidance products (e.g., the Tax Windfall Playbook) are written for US taxpayers and US tax law. They are not applicable to non-US tax jurisdictions.

Legal products are written as general frameworks, not jurisdiction-specific legal advice. Always verify applicability with a licensed attorney in your jurisdiction.