All Help Topics
Change or Cancel Your Order
Need to modify your order? Learn how to quickly change or cancel a recent purchase.
Order Status and Tracking
Looking for your tracking number? Learn how to check your order status and follow your shipment from our warehouse to your door.
Request an Invoice
Need a copy of your receipt? Learn how to easily obtain an invoice for any of your previous purchases.
Out of Stock and Backorder
Learn why items may be out of stock and how backorders are handled. Find info on Item availability status and what that means for your order.
E-Mail Notifications
Track your order status, manage promotional email preferences, and learn about our automated email notifications.
General Shipping Information
General shipping policies and procedures for all shipments
Shipping Issues
Learn how to handle damaged shipments, missing items, and refused packages. Report transit damage or missing products within 24 hours to ensure a valid claim.
International Shipping
Learn about USPS Priority Mail International shipping to Canada. Get details on delivery times (6-14 days), tracking availability, and international customs duties.
Return Policy and Instructions
Review our 30-day return policy. Learn how to request an RMA number, report damaged or defective items, and understand restocking fees and non-returnable items.
Damaged Items
Received a damaged product? Learn how to file a claim within 24 hours, document packaging for shipping claims, and request a replacement or return label.
Defective Items
Need to report a faulty item? Learn about our 30-day defective product policy, how to get a prepaid shipping label, and our replacement or refund process.
Warranty
All OEM products are sold with the full manufacturer's warrantyplease consult the information enclosed with your packaging for terms and conditions.
Account Info
Create an account to track orders in real time, view history, and manage subscriptions. Learn how to update your profile, change passwords, or delete your information.
Security
Learn about our secure checkout process and privacy policy. We prioritize your security with strict fraud prevention and confidential data handling.
Terms Account
Set up a terms billing account for your business. Apply online today for credit approval and receive automated email confirmation once your account is ready for use.
Wholesale or Bulk Purchases
Set up a terms billing account for your business. Apply online today for credit department approval and receive automated email confirmation once your account is ready.
Order Processing
Processing timeframes, placing an order, and order processing notifications
Payment Methods
Review payment options available at checkout
Phone Orders
How to place an order over the phone
Sales Tax and Tax Exempt
Sales tax, tax exempt, international taxes and when they are applicable
Sales Policies
Complete list of store policies and procedures
Clearance / Discounts
Details regarding items put on clearance and current coupons or promotions
Contact Us
Click here if you have a question on a product we sell, a general order related question or just need to contact us.
Product Support
Help with technical product questions, warranty information and part replacement.
Holiday Shipping and Hours
Please be aware of our Holiday operating times and shipping windows
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Payment Methods
- Terahertz Store accepts VISA, MasterCard, American Express, Discover, PayPal, Apple Pay, Google Pay and Venmo. Once your order has been received and your payment information has been verified, your payment will be processed and Terahertz Store will appear on your billing statement.
- Based on your purchase item type, quantity or order dollar amount we reserve the right to request payment in the form of PayPal, ACH, wire or check prior to processing the order.
- For your security and to prevent fraud, if information used for a purchase appears to be potentially fraudulent, we reserve the right to contact you and request additional information before processing your order. This process may delay your shipment.
- All transactions will post after 5:00pm (CST) on the date of purchase.
- Upon submission of your order, you will automatically be sent an e-mail to confirm that your order has been received. (Please be sure to check your spam/junk mail for this notification)