If the livestock that we ship via FEDEX one and two day service (caterpillars, plants) do not arrive alive, we will replace or credit your account. You must notify us by email within 24-hours that your livestock (they must all be dead) did not arrive alive. LIVE MATERIAL REPLACEMENT POLICY REGULAR PRIORITY MAIL SHIPMENTS DO NOT CARRY A LIVE MATERIAL SHIPPING WARRANTY. A LIVE MATERIAL (ARRIVE ALIVE) SHIPPING WARRANTY IS OFFERED ONLY FOR FEDEX EXPEDITED one and two day SERVICE - NO EXCEPTIONS. WE DO, HOWEVER OFFER GENEROUS FREE LIVE MATERIAL REPLACEMENT OPTIONS (SEE BELOW) If your live material order shipped via priority mail or FEDEX 3-day service, free replacement larvae are available with the purchase of FEDEX Expedited one or two day live material replacement shipping available as a shopping cart item under the category Replacement Live Material Shipping or, if you prefer, mail check for FEDEX LIVE MATERIAL REPLACEMENT SHIPPING ($35.00 for FEDEX 2-day and $65.00 for FEDEX EXPRESS overnight) to EDUCATIONAL SCIENCE, PO BOX 747, League City, TX 77574. Attn: Replacement Larvae. Be sure to include in the customer comment section of the online order form or letter: Name order was placed under, original order ID/invoice, or certificate number, and include where you purchased your kit. We also offer free monarch larvae replacements with the purchase of a milkweed plant (BF 100A). Tell us in the customer comment section of the online order form that you would like free replacement larvae sent with your milkweed plant. Be sure to include the name the order was placed under, your original order ID/invoice, or certificate number, date purchased, and where you purchased your kit. We are not responsible for live material left unattended (ex: mailbox, doorstep, etc.) or intemperate weather. We recommend that live material be shipped to a place of business (work address) or PO box rather than a home address. PRIORITY MAIL POLICY PRIORITY MAIL DELIVERY Service IS NOT DEPENDABLE TO ALL ZIP CODES AND CAN BE HAZARDOUS TO LIVING MATERIAL---PRIORITY MAIL DELIVERY CAN TAKE UP TO 10-DAYS TO SOME RURAL ZIP CODES. MOREOVER, THE POST OFFICE, SINCE THE 911 ANTHRAX SCARE, IS SPOT GAMMA-IRRADIATING THE MAIL AT SELECT ZIP CODES WHICH CAN Prove DEADLY TO LIVE MATERIAL.