1. Open your account here: http://cevo.com/xapo/

2. Follow the steps to login to your Xapo account (if you don't have one, you can create it here: http://xapo.com/r/7H6MELU)

3. Authorize Cevo 

4. ENTER THIS REF. CODE: c0ZQWjRoR2FsT2pURENqSm9NZHBlTmNzVGplaERieGh2Z04xTUw4MHlXQT0

And that's it. You can open a vault and earn some BTC. 

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More about this partnership program here, on the oficial Xapo blog: https://blog.xapo.com/xapo-launches-gaming-cevo-leetcoin/