Important: If you supply products for sale on Amazon, you must comply with all federal, state, and local laws and Amazon policies applicable to those products and product listings.
Amazon’s policies require that certain invisible ink pens sold through the Amazon website meet specified certification standards. In order to sell these products on Amazon, you must apply by submitting the following to email@example.com:
Invisible Ink Pens
A pen with transparent ink and integrated UV light.
What type of invisible ink pens are restricted on Amazon?
All invisible ink pens not meeting toy standards, but being offered as toys, are restricted for sale on Amazon. Invisible ink pens not being marketed as toys and being offered outside of child-related categories are OK for sale.
Images (restricted for sale)