how -> prove our credibility?

Credibility is the quality that makes people trust you
and believe in you. If yours is strong, you'll be well prepared to persuade others.

there are a thousand way to prove the company's credibility

For the newcomer -> 10 ways to increase credibility:

1.    Use full contact details.
Publish your full business address (not a P.O. box),
cell phone number and other ways to contact you.
People like to know that they can call you or send enquiries
anytime they want. If you try to hide away from
your customers you will loose sales. For the periods
when you can’t answer your phone, make sure that
you use an automated answering service.

2.    Identify the people behind the business.
Transparency is vitally important on e-commerce sites.
People feel a lot more comfortable when they are
dealing with a real person. Tell about yourself including
a brief background if has any relation to your business
(education, career, awards, etc). If you’re a member of any
professional associations, place their logo.

3.    Respond to enquiries promptly.
Respond all emails or web-form enquiries you
receive in a timely manner. It will boost credibility
of your company. Make sure to answer all enquiries
even if they sound funny or strange.

4.    Update your site's content often.
Forget about static content on your website –
times have changed. No matter what you sell
there is something that you can update from
time to time - seasonal offers, coupons, or articles.


5.    Limit any promotional content (e.g. ads or banners). Too many advertisements lower your website credibility.
A lot of people say that they will not make a purchase on
a website that has a lot of context ads. It will seem that its
owner thinks only about money and all possible ways to increase profits.

6.    Display customer testimonials.
Gather customer testimonials and publish them
on your website. Include your customer's name,
web address, photo, audio stream or video stream to
increase believability. You can also add scanned documents,
screenshots or other visual representations to prove that
your testimonials are not a fake.


7.    Join your local Chamber of Commerce or Better Business Bureau.
You can display BBB and Chamber of Commerce images
on your website to increase customer loyalty.
If you want to be accredited by your local Better Business Bureau,
your company needs to comply with a set of their ethic
standards and pay annual dues. Chambers of Commerce
have similar membership programs.

8.    Use security badges.
Many SSL certificate providers offer trust marks that customers
can click to confirm that the site uses SSL (Secure Sockets Layer)
encryption technology. In addition, make sure that all website
pages will be loaded securely - or your visitors will
get a warning message “This page contains both secure
and nonsecure items. Do you want to display nonsecure items?”


9.    Avoid errors and broken links.
Spelling errors, broken links, bad grammar, or pages
that don't display correctly hurt a website's credibility
more than most website owners imagine. Get someone
else to check your website because we often don’t notice our own errors.

10.    Have a clear privacy policy.
Ensure that your privacy policy is sufficient to meet
privacy laws and provides adequate comfort to your
customers. Typically, privacy policy indicates how
website owners will use visitors’ personal information.

Further Information:
http://ecommerce-journal.com/articles/16236_10_ways_to_increase_credibility_of_your_website