Firstly, there is no solicitor in the UK with a practising certificate under that name.
Neither is there a UK practice of that name.
In order to practice in Spain a lawyer would have to be registered with the local jurisdiction's Bar Association. If the solicitor is practicing, or saying they practice in Madrid then they would have to be a member of the Madrid Bar Association. They will be able to verify if there is a lawyer of that name registered with them.
Because of the translation it's a little difficult to tell but I believe the following web page is a list of contacts for he Madrid Bar Association and you should try them (translate if necessary):-
If that does not work I would contact the British Embassy in Spain and ask to be re-directed to the Madrid Bar Association-
I cannot find a record of a Spanish law firm called Bundy's but I think the sure fire way of verifying is by contacting the Madrid Bar Association, possibly via the embassy.
Why do you require verification? Have they contacted you? What is the issue at hand?
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Edited by Thomas on 9/14/2010 at 1:43 PM EST