When a tax-exemption certificate is missing, expired, or invalid, the audit liability is yours. ExemptGuard is the audit-defense layer: buyers upload certificates on your storefront, AI reads the fields, each one is validated — including multi-state MTC and SSUTA forms — and vaulted with a full audit trail. Renewal requests go out before expiry, valid certificates set the customer tax-exempt, and one click exports an auditor-ready register. Your tax engine calculates; ExemptGuard defends.

• Storefront upload widget — wholesale buyers submit certificates themselves
• AI reads state, number and expiry off every upload — you confirm each field
• Multi-state validation flags invalid, wrong-state and expired forms early