Common reasons:
You asked for the money to go to a different method or person from the one that funded your account.
We can't use your chosen method, so we've suggested another.
We need more documents, or the documents you sent didn't meet our requirements.
If we can't complete our checks, we return the money to your trading account and tell you what we need. Charges from your bank or payment provider aren't refunded.
What to do: submit a new withdrawal request using the method we suggest, or send the documents we ask for.