An tax exemption certificate is the form presented by an exempt organization or individual to the seller when making a tax-exempt purchase. Exemptions are based on the customer making the purchase and always require documentation. Different purchasers may be granted exemptions under a state’s statutes. Disclaimer Our content is not in any way legal advice or binding. The information provided by might not be the official legal or full definition. Also when pursuing a specific transaction you are encouraged to conduct your own due diligence and to consult legal counsel as appropriate.