Contact Us

Customer Service - by E-mail, Fax, or Phone

If you have questions about OTSI or our products or services, you can contact us in the following ways:

• Send e-mail to CustomerService@otsi.com.
• Send a fax to (888) 308-6875.
• Call (888) 308-6874 and press extension 10 for Customer Service. We will return all non-solicitation calls within two business days.

By Mail

Please direct invoices and payments to:

P.O. Box 951
Bellevue, WA  98009-0951
USA

For Deliveries or Returns

Parcel service and freight deliveries are accepted between 8:00 A.M. and 4:30 P.M. PST at the following address:

602 Bellevue Way SE
Bellevue, WA 98004
USA

All returns must be accompanied by a valid Return Authorization number. To request a Return Authorization number, fax or e-mail your request to us. Please have the original invoice or purchase order number available.

Credit Memos will be issued for approved returns. The amount of credit issued will be determined by the condition of the books when returned. A 10% restocking fee will apply to all returns. when returned. Credit Memos are redeemable for merchandise only (no cash refunds) and must be used within 1 year.

Book Orders

See the Ordering Information page for information about ordering Quick Course books.

You can purchase Step by Step books from any major bookstore or online retailer.

Return Information

New books in resalable condition may be returned for credit. Returns will be accepted for 6 months after the date of the original invoice, unless by prior arrangement. Return shipping charges are the responsibility of the customer.

Books damaged during shipping from our warehouse may be returned for a replacement (same title only). Return shipping charges for damaged books will be paid by OTSI.