I need a word that means "trusted tip". (tip=recommendation) The word
can be in any language, English not preferred. It can be a translation
in another language, a synonym or a concept (like Keiretsu in
Japanese). Here comes the difficulty: I want to use it as an Internet
company name, so it should be simple, easy and as short as possible.

Here in the UK, 'A1 at Lloyds' means the highest quality or everything
is excellent. So why not A1tip or aonetip. Both available.
answerfinder-ga

Looka da Both Ways ...

(Before you crossa da road.)

Looka-da-Both-ways is gooda Pidgin English & is probably available but ...

QUICK before someone-a elsa grabby it!

http://babelfish.altavista.com/

it will convert any word to and from any language.

You can even try converting it multiple times to get even better answer. :)

Referral fits the desciption for a "trusted tip" :

://www.google.com/search?hl=en&lr=&q=define%3Areferral

So perhaps the word referral in another language.  Since I do not
speak other languages I would suggest using the translating tool from
the above posting:

http://babelfish.altavista.com/

 
Or another similiar site.

Put babel fish into your search engine. You can then translate your
phrase into any language you like. However I suggest you then
translate it back to check for dodgy meanings. Best of luck with the
business.

"Credence" and "Recommendative" both have generally the same meaning.
I'm messing around with www.onelook.com's Reverse Dictionary. Try
that? "Credence" is a cool name. . .