For every order of this item, you must provide a signed Material Transfer Agreement Addendum for National Park Service Products. We cannot ship this item until we receive this addendum. The person signing the addendum as the principal investigator must match the end user as listed on the applicable sales order for the item. Email the signed addendum to SalesPermits@atcc.org with a reference to both your account and sales order numbers. Once received, your addendum will be reviewed, and this item will be released for shipment if all requirements are met. If you need assistance with your order, please contact our Customer Care team.