Passport alias name

All unapproved Citizendium articles may contain errors of fact, bias, grammar etc. A version of an article is unapproved unless it is marked as citable with a dedicated green template at the top of the page, as in this version of the 'Biology' article. Citable articles are intended to be of reasonably high quality. The participants in the Citizendium project make no representations about the reliability of Citizendium articles or, generally, their suitability for any purpose. This article is currently being developed as part of an Eduzendium student project. The course homepage can be found at CZ:Special_Topics_2010. To provide students with experience in collaboration, you are warmly invited to join in here, or to leave comments on the discussion page. The anticipated date of course completion is 13 August 2010. One month after that date at the latest, this notice shall be removed. Besides, many other Citizendium articles welcome your collaboration!

The pronunciation of a name that comes from a non-English speaking country could really sound weird or be difficult for people to say it right. To make live easier, some countries offer the ability to display an official name which people prefer to be called when traveling on the passport known as "AKA Name" or "Alias Name." However, even this name is listed on the passport, some of the US agencies do not allow it to be used on any legal documants. This issue has been a huge headache to a considerable amount of travlers and immigrants.

Does the statement "All requesters should provide all possible name variations or spellings." documented on the USCIS website imply that the alias name is actually a legal name? If the answer is yes, why do people still have problems to use alias name on some legal documents such as the married licence and the driver's licence?