ECM transforms exemption management into a real-time risk control function. As certificates arrive, ECM validates them against jurisdictional rules; extracts and verifies required fields with an AI assistant; and flags expired, invalid, or missing certificates by customer, geography, or document type. Built-in dashboards and configurable alerts let your tax team take preemptive action before issues surface during an audit, and audit-ready reporting lets you produce the documentation states ask for during sampling-based audits without scrambling through filing cabinets or shared drives.

When you cross an economic nexus threshold, you become responsible for either collecting tax or holding a valid exemption certificate for every previously untaxed sale in that state, often retroactively for the audit lookback period. ECM lets you launch automated multitouch outreach campaigns (via email, postal mail, and the CertExpress portal) to back-collect resale and exemption certificates at scale, route the right state form to each customer through CertExpress, and validate submissions in real time. Exemption certificates and resale certificates are maintained together with full history, so when an auditor asks for years of documentation for a newly registered state, you can pull it down in minutes rather than months.

Drop shipping is one of the most common audit triggers because the supplier, the seller, and the end customer can each be in a different state, and not every state accepts an out-of-state resale certificate from the seller. ECM gives you the complete library of state-accepted forms (including the Multistate Tax Commission Uniform Sales & Use Tax Resale Certificate, the Streamlined Sales Tax Exemption Certificate, and state-specific resale forms), guides each buyer to the correct form for the ship-to state, and tracks both home-state and ship-to-state requirements together so a buyer who only has a home-state resale doc can be flagged for an additional document where the destination state requires it.

Expiration rules vary widely by state and by certificate type. Some states require annual renewal (Florida resale certificates, Alabama certificates of exemption), some have multiyear cycles (often three to ten years), and some states keep certificates valid indefinitely as long as the underlying customer information stays accurate (California, New York, Pennsylvania). Project-specific certificates expire when the project ends. ECM has state-specific expiration rules preconfigured, runs renewal reports, and triggers automated multitouch CertExpress campaigns to your customers as certificates approach expiration. That removes the manual tracking burden and reduces the risk that you exempt tax on the basis of a certificate that expired months ago.

ECM is engineered to fit into existing finance landscapes without custom development. Avalara has more than 1,400 signed partner integrations across ERP (NetSuite, SAP, Microsoft, Oracle, Sage, QuickBooks), ecommerce (Shopify, BigCommerce, Adobe Commerce, WooCommerce), procurement, and POS platforms. ECM Pro and Premium can run alongside AvaTax for end-to-end determination plus exemption, or as a standalone product alongside a third-party tax engine. A robust REST API and developer tooling are available for custom integrations, including bulk certificate intake, customer sync, and certificate-status queries.

ECM connects directly to AvaTax for determination and to Avalara Returns for filing, so exemption decisions are reconciled inside the same workflow that calculates tax and prepares your returns. CertExpress sits in front of ECM as the customer-facing collection portal. Avalara Managed Services for ECM is available if you would rather outsource day-to-day certificate validation, outreach, and exception handling. The result is a single audit-ready record of every exempt transaction, the certificate that supported it, and the return on which it was reported.