I googled for purchasing of adwords voucher and some results turned up. Does anybody have any experience purchasing these vouchers from these 3rd parties?

From what I am aware 3rd parties are not allowed to sell or simply giveaway vouchers for Google Adwords. I have signed up for Google Engage. This allows me to offer Google Adwords Vouchers for my customers.

I would recommend reading their and Google's terms of service, before buying from 3rd party companies. To remove the risk from yourself.

I believe these vouchers are only valid for new clients.

That is one of their terms so if you are wanting a voucher I'd suggest try find one bigger the better as you can only get a voucher once

I'm aware of that. I'm thinking of distributing these vouchers for free as part of a promotion kinda thing.

Google Engage only allows you to give away 20 $100 vouchers and is supposed to be for SEM companies as incentives to gain clients.

As part of the Google Adwords, you can receive vouchers to distribute to other people based on how much money YOU spend on Google Adwords yourself.

There used to be an area on google that you could apply for vouchers to distribute to your clients, but it looks to be offline - https://services.google.com/adwords_comarketing/

The requirements for hosting companies was that you had a minimum of 1,000 customers and were involved with the google adwords program spending "X" dollars (I want to say it was a minimum of $1,000/month - or maybe I'm confusing that with the Approved Adwords Creators).

Anyone have the comarketing link that works?

The only co-marketing links I could find were for Great Briton and Ireland. You can get vouchers from the Google Engage Program.

Google Engage Program ... I have heard about that for the first time, can you tell more about it please?

Google Engage, For more info visit http://www.google.co.uk/ads/engage/. They will ring you up to confirm and verify your details etc.

We also use google engage for our client base. We can give 2500 Rs or 50$ Per client

Google Engage is for SEO companies rather than hosting companies. If you provide SEO Services, this is something additional that you can provide to clients so that they get a taste of what Google Adwords can do for their site (showcasing how YOU can help them with their adwords campaign at the same time).

well when you apply for Google engage plan then it gives option for the company that can take advantage. Yes its main aim is to target SEO companies but what Google want is loyal client. If you can give the desired result from from any product selling or product info site or any that benefits Google then they would not hesitate to approve that application. That's all Google want from us or anyone in online market

this answers my questions, i tried buying it once but it is not successful.

but there was any way that we had use Google voucher once and with same id we can use other one and any have some idea please share with us