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
Learn about our order processing timeframes, how to place an order online or by phone, and what to expect regarding email notifications and inventory updates.
Payment Methods
Explore our accepted payment methods, including credit cards, PayPal, and mobile wallets. Learn about our terms accounts for eligible customers and our secure payment verification process.
Phone Orders
Learn how to place an order over the phone or online. Call our customer support team to process your order through our secure system and review our sales policies.
Sales Tax and Tax Exempt
Information regarding Illinois state sales tax rates and instructions for tax-exempt businesses or government agencies to submit documentation for tax-free purchases.
Sales Policies
Review our sales policies including order processing times, payment methods, shipping details, and tax-exempt requirements. Find information on tracking orders, managing cancellations, and handling transit damage.
Clearance / Discounts
Save big on discontinued items and limited-time offers. Learn about our clearance sales policy, how to use promotional coupons, and sign up for exclusive discounts.
Contact Us
Need assistance? Our customer service team is here to help. Contact the right associate for a swift resolution to your inquiry.
Product Support
Help with technical product questions, warranty information and part replacement. Find product manuals and spec sheets for your product.
Holiday Shipping and Hours
View our holiday operating hours, shipping deadlines, and back-order processing details. Stay informed on office closures and estimated delivery times during the holiday season.
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Clearance / Discounts
Clearance items are items that we choose to significantly discount for your benefit. Typically, clearance items are items discontinued by the manufacturer and that we have a limited supply remaining in stock. Due to the nature of clearance items, all clearance item sales are final and are not returnable.
Coupons / Promotions
We offer promotions and discounts to our customers on a regular basis. If we have any promotions currently running you may view them at the top of our home page www.terahertzstore.com.
When you purchase an item, you are also given the opportunity to provide your e-mail address to receive coupon codes and updates on limited offers. This is a great way to stay informed of upcoming promotions and deals. Only One coupon code may be used per order.