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Never heard about that... Even if they had some issues the support is awesome, just write them a quick message and you will get an answer after 24hr or if it´s very busy it might take 48hr usually not.

Try contacting support if that happens. Every exchange has problems. How they deal with them is more important.

my deposit from Polo to Bittrex does not show up in my Bittrex wallet even though Polo says it was completed. I have the hash and checked the blockchain to confirm it should be there. Is that something that the Bittrex folks could help on?

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