Adult Signature Restricted Delivery

To verify age, add security and theft protection we kindly ask for the Adult Signature Restricted Delivery service free of charge for all orders containing Functional Glass.

Adult Signature Restricted Delivery requires USPS Priority Mail or Express and is automatic for all orders containing Functional Glass.

• This service requires the signature of the addressee only, who must be 21 years of age or older.
• Upon delivery, the recipient is required to show a government-issued photo identification for proof of age.

Priority Mail is complimentary for orders over $500.