No three day course can qualify anyone as a User Experience (UX) professional in my opinion. Every project, client and challenge is different because technology and people are so diverse. For anyone starting in UX, I would suggest applying for a junior UX position, gain project experience, attend UX conferences and most importantly learn from your peers in the field.

No three day course can certify anyone. The only certification in my eyes is a happy customer. If they are happy with your work, it’s likely their website is making more sales, their intranet is more efficient or communication channels are improved. And if you keep learning and promoting UX then you’ll feel certified for sure.

I posted this on Twitter - people seem to agree that three days is pretty short for what the course claims to cover. I would hope people wouldn't come out the other end marketing themselves as UX professionals.

If you are going to look into certification at all, I would recommend the Certified Usability Analyst training with Human Factors International. It is much more in-depth, and a lot more in line with how certifications work for other disciplines.

As for the credibility of HFI for providing certifications, I'll use programming as an example. I would put them between Microsoft with their developer certifications, and IEEE with the Certified Software Development Professional certification. They are in it for a profit, definitely, but they also have a fairly significant investment in growing the quality of the field overall, not just for their solutions.

Depending on how much time you have, I would suggest you enroll in a Masters program, eg in Human Factors. However, the financial situation here in Germany, another one, because it costs nothing.