It is prohibited on Kidizen to sell counterfeits or replicas of branded products. The item you are listing must be made by the company or designer represented by the logo or brand displayed on the item. If you cannot verify the authenticity of the item, then it should not be listed on Kidizen. Selling counterfeits or unauthorized replicas is illegal and will cause permanent suspension from Kidizen.
Kidizen currently doesn't have an authentication program, therefore it is up to the buyer and seller to inspect the item (or ask for additional photos) for tags, logos, materials, hardware, etc.