Whatever you say. I just meant that Sir/Madam could be applicable to your question, when gender is unknown. Referring in the name only could be considered too casual in some situations.

>I used to always write Dear Sir/Madam when I don't know the name. Somehow recently I started to dislike this form. Since I know first/last name, may be simple
>
>Dear FirstName LastName,
>
>....
>
>Sincerely,
>
>
>
>will suffice?
>
>Thanks.
>
>>Use 'Dear Sir/Madam' and put the name on top.
>>
>>>What if I omit Ms. and just write
>>>
>>>Dear Lauren LastName,
>>>
>>>...
>>>
>>>Or
>>>
>>>Dear Ms. Lauren ... is better ?
>>>
>>>
>>>>Female
>>>>http://www.zelo.com/firstnames/findresults.asp?name=LAUREN
>>>>>Hi everybody,
>>>>>
>>>>>I'm writing a letter to Lauren and need to know how to proper address this person. I started Dear Sir, but then had second thought.
>>>>>
>>>>>What do you think?
>>>>>
>>>>>Thanks in advance.