i recently processed a transaction with bitstamp only to get the following support message:
We have received your withdrawal request and instructed our payment department to further process it.
However, as your withdrawal request met some of our volume and frequency thresholds, we will have to kindly ask you to help us better understand the nature of your relationship with Bitstamp. In order to do so, we require that an additional KYC (know your customer) procedure is completed before we can proceed with the processing of your transfer.
We kindly ask you to answer the following KYC questionnaire:
1. How did you learn about Bitcoin? 2. The purpose of trading on Bitstamp? Please describe in as much detail as possible how you intend to use your trading account. 3. What is the origin of the deposited Bitcoins? If mining, please specify your hardware specifications and submit a receipt or an invoice for your mining equipment. 4. What are your future plans and activities planned on our exchange? 5. Do you plan more withdrawals in the future? 6. Which bank do you indent to use? Please provide the complete address and SWIFT code. 7. Estimated amount that you would be depositing/withdrawing to/from your Bitstamp account per month (in USD and BTC)?
If you have any questions in the meantime, please feel free to ask.
Thank you for your cooperation and we look forward to your reply.