custom usertitle condition in template

[squishi]

In a template, how can I check if a user has a custom usertitle?

Along the lines of... (pseudo code)

<if condition="has_custom_usertitle == true">$post[usertitle]</if>

[kh99]

Try this:

<if condition="$post['customtitle']">$post[usertitle]</if>

[squishi]

Thank you very much.