Originally Posted by LongviewTX

Unless you're sending money to yourself the only reason I'm aware for which you could be banned is failing/refusing to substantiate transactions if asked to do so by Amazon Payments.

There's nothing wrong in A>B>A transaction as long as you have a clear and concise story what A>B part was for and what B>A part was for (remember you have to substantiate "Sale of goods and services" you cannot just say you loaned the money and then got repaid as it would be "Cash advance")