How can I confirm that they are really a Nike authorization factory?

When asking one of my reasearched suppliers based in China, whether their products were authentic. I received the following reply:

"We are an authorization factory at China to produce Nike shoes and our shoes are original with top quality. After your first order I could provide you with the authorized letter for your reference''

What type of questions could I ask this company to confirm this is not a scam and that they really are authorized to produce original Nike shoes? As it appears a little odd that they say they will provide me with an authorization letter after the first order?

FYI, the Nike manufacturer in China only produces for the China market.
All Nike distributors are not in China. / for export that is.

Nike has a lot of contracted shoes manufacturers around the world, mostly in developing countries. I believe that the factory you are contacting could be one of those authorized manufactureres BUT not an authorized sales/export channel. You should contact Nike or their subsidaries though they pricings would have kill the business before it start.

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So, is it even feasable to find a legit Nike supplier? I know they are out there, but its like a needle in a haystack. Anyone know of a certain company?

Very eash, verify with Nike head office. Actually, after your message I would expect them to interfere and confirm if they have a plant in China. Most of European factories have plants in China, this is correct.

It's hard to determine whether or not a factory is authorized by Nike. I was scammed by a factory just recently saying their shoes were authentic and even showing me a letter from Nike stating it was so. Upon arrival of the goods here in the USA, it was confirmed by myself and several colleagues that the shoes were fakes and of poor quality.