Question: I applied for Company A for a job. I applied also for Company B.

Company A has given me an offer. I accepted it, and I canceled all of my other applications, except to Company B. I did it because Company B was a much better job, but I've seen only a small chance for a success.

Company A sent me a contract to sign, and started to organize the starting procedure.

Meanwhile, also Company B has given me an offer. It was a surprise, but I had luck.

Now I need to cancel the procedure for Company A.

Yes, on the paper and on the law is everything okay. I got an offer, I am free to reject it.

But, the sad truth is that I was unthinkably dishonest. They honored me with a job, they trusted me, and I slapped them on the face. That is the truth.

I am ashamed.

What the heck could I do? What?

What should I say to them? I think, I will be forever blacklisted at Company A, and I deserve it, but what should I say them?

Answer: 
> 
> But, the sad truth is that I was unthinkably dishonest. They honored me with a job, they trusted me, and I slapped them on the face. That is the truth.
> 
> 
> I am ashamed.
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> 
> 

No need to be ashamed, thats just business. You are looking out for your best interest, the company is looking out for theirs..

Since you haven't signed, there's no legal obligation on your side.

> 
> What should I say to them?
> 
> 
> 

Thank them for their interest in you and their time spent on the application process and tell them you found another job that's more suitable to you.
You could add that they might keep your record for future opportunities.

That's all there is to it - no need to loose sleep or get grey hairs over it, your move is not so uncommon and completely understandable..
You have the choice: Get a much better job with B, and make A upset. Or get a much less good job with A, and make B upset.

In that case you look after #1, which is YOU. You do what's best for you. A is a business, they have to look after themselves, and if they can't, tough. So what's best for YOU? Take the job with B. It's business.

And you were not dishonest. Every reasonable employer will expect you to look after yourself and your interests, and they will look after their interests. So going with B's offer is totally expected. Sure, A will be annoyed, but that is part of being a business, sometimes things happen that you don't like.