This post isn't a sales pitch - in fact it's the opposite. I frequently turn away potential clients and I encourage them to do the same if they feel we're not a good fit. A good resume writer will require an investment of both time and money and you need to make a wise choice. And there are many bad choices out there. Believe me I know!
About once a month, I take on a client who has paid a lot of money to another resume service, only to hate the results. While I obviously like getting new clients, these situations make me both sad and angry on behalf of the clients who were hurt by one bad choice.
So here are my recommendations for selecting a resume writer.
1) Shop around. If you like the first company you find - even if it's mine! - I still recommend contacting a couple of other services just to be sure that you're in the best hands.
2) Look at samples. All good writers should display samples on their site - preferably in 'before' and 'after' format so that you can see what changed. Look for quality, but also look for variation. Does each resume have a different structure? Does each one use different words? Or are they all the same, as though a template was used. And finally, do they impress you personally?
3) Ask about guarantees. Personally, I think all writers should offer a 100% satisfaction guarantee. But most are not willing to go quite that far so you may have to settle for less - at the very least, your writer should promise to rework your resume as many times as possible to ensure your satisfaction.
4) Evaluate their qualifications. What makes them qualified to write your resume? Do they understand your industry or function? Have they worked in recruiting or HR? If not, do they have other expertise in those areas that gives you a sense of comfort? (Perhaps they have written books, or have lots of certifications, or come highly recommended by other people in your field).
5) Ask what they DON'T do. We turn away clients who want to work for the federal government or academia because none of our writers have expertise in these areas. Any good writer should be turning away clients - it proves their honesty.
6) Are they web savvy? Is their website modern and well maintained? Have they conveyed their brand well? Do they blog? Do they have a Linked In or Facebook page? You are hiring someone to help market you - make sure they know how to market themselves effectively in today's world.
7) Check LinkedIn testimonials. LinkedIn testimonials can't be fudged because the site allows you to click through as see who wrote the reference. To see them, you must be a member but it's quick and easy to sign up. Don't hire a writer who doesn't have glowing testimonials.
8) Who else refers their services? If you're still unsure, ask who refers clients to them. Do they have affiliations with career counselors, recruiters or other websites? Such relationships - especially with recruiters - are indications that their work is respected by the people who count.
9) Be sure the process works for you. Resume services have different approaches to writing a resume. Some require the completion of worksheets to develop a career history and value proposition. Some utilize phone interviews. Some do a combination of both. I personally prefer worksheets and we've developed a very specific proprietary worksheet that helps us develop a truly compelling resume- but not every client is comfortable with this process and it's important to know that upfront.
10) Finally, don't base your decision on price. I know that price has to be a consideration, but don't make it the be-all and end-all. Those cheap services advertising on the web are cheap for a reason - in most cases they will outsource your work to underpaid writers who have to work quickly just to make a living. In other cases, the fee is low because the person is in no way qualified to do this but saw a chance to make some money from home. If you can't afford to hire a good resume writer, take the time to learn about resume writing from books or articles and do it yourself. You'll get better results, believe me.
You'll notice that I didn't include professional certifications in my list. That's because I don't personally feel they are a reliable indicator of quality. This is a controversial view in my industry, so take it as just my opinion. If you do feel that professional certifications are important, by all means include that in your decision-making, but be sure to check for all the other factors as well.
Choosing the right resume writer can make all the difference to your job search so take the time to understand what you're getting. Good luck!

I'm Louise Fletcher. As President of 
About.com just updated their top 10 job board list. Considering 3 are agregators, this leaves 7 job boards to recruit from:
http://jobsearch.about.com/od/joblistings/tp/jobbanks.htm
If you really want to find a job you should be on all of them.
Posted by: trisha | July 01, 2008 at 12:05 PM
Louise,
Your 10 points are very helpful, and as the owner of another leading resume writing firm, I very much agree with your advice to the public.
You are right to state that professional certifications alone are not a reliable indicator of quality, but I do believe that, combined with other elements, they can demonstrate three important factors:
1) The writer had made a commitment to his/her craft and has made an investment of time and money into attaining the certification.
2) The writer has endeavored to keep abreast of the latest developments in the field (most certifications require annual CEU courses to maintain accreditation).
3) The writer is subject to arbitration / dispute resolution in the event of customer dissatisfaction issues, a pro-consumer service that most resume writing associations provide (like you, I offer a 100% money back guarantee, but many do not).
Thank you Louise, and keep up the good work. If you are ever in New Orleans for a conference or vacation, stop by the office!
Grant Cooper, C.A.R.W.
Posted by: Grant Cooper | July 01, 2008 at 03:55 PM
Good points, Grant. I definitely see a value in them as a starting point when evaluating firms.
It's interesting that I've been doing this for 5 years now and been asked about certifications maybe 3 times in all that time. The associations definitely don't do a good enough job of promoting the value.
Posted by: Louise Fletcher | July 02, 2008 at 04:17 PM
Louise
Agree! Agree! Agree! - from a CV provider in Ireland.
Jobseekers treat sourcing CV design services as they do sourcing any other service. They run with the 1st one they find without considering any of your outlined points. I advice all jobseekers to read this post!!
Posted by: Paul - CV Service Ireland | July 05, 2008 at 06:33 AM
I completely agree. That was very well written and I have been referring clients to this article ever since you first posted it. :) Nice work!
Posted by: Jennifer Anthony | August 08, 2008 at 07:00 PM