Indeed, it is ok to use a P.O box in your address.
English language: All order details need to be placed in English language only. Please note, any orders not placed in the English language may not print address labels correctly and thus, will not arrive to your shipping address.
The use of diacritic marks such as ñ will not be printed and thus TONIK will not be liable for refund / or replacement.
If you have purchased TONIK we assume you are of the legal age.