You are also welcome to ask questions in one of Wikipedia's IRC channels. If you have an IRC client installed you can join a channel by connecting to #wikipedia-en-help (a help channel for Wikipedians) or #wikipedia (for general chat about Wikipedia). Wikipedia's IRC channels are found on the freenode network.
Wikipedia is a volunteer-operated site.
There is no "documentation service" nor are there any paid staff to process inquiries about the content of articles (sources, accuracy, etc.).
Please write all inquiries to the relevant reference desk or talk page; see above.