katrina_ilagan- I would think that a birth certificate should be good enough to change your name. In this case, I'm not entirely sure that you would need to though. We have many customers that don't use their middle names (I'm using your example, so I hope that's the trouble) yet are able to add their banks without problem. I would recommend trying to add and confirm your bank first, then if it fails we can work on the name change.
Hope that helps.
Andy
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