Join us in celebrating our 50th Anniversary!
Join us in celebrating our 50th Anniversary!

Find Answers to Online Store Questions

Back to FAQs

What are the payment options for the online store?

VISA, MasterCard, American Express, and Discover are accepted. Members, depending on their level, receive discounts and free access to products. Learn more here.

Can I order with a purchase order through the online store?

No, purchase orders must be faxed to +1 610.688.0700 or e-mailed to

Can I return products to CLSI?

Yes, if products are in saleable condition, the customer may return the items for credit or exchange (within six months of the transaction) and include a copy of the packing slip to:

Attn: Rebecca Cason, CLSI Returns
9050 Junction Drive
Annapolis Junction, MD 20701

Can I order documents at the same time I apply for membership?

Yes, please let us know in the form or when you speak to us.