What validity do good execution certificates in contracts with individuals have?
Let's see, the certificates of good execution are basically like the “yes, he fulfilled” that they give you when you finish a project or service and did not pee it. They usually ask you when throwing yourself into a public tender, roll "Do you have papers that show that you are not going to leave this halfway?" Well, there they are, perfect to show off.
Now, when the contract is with individuals - not public or anything - the thing gets a little more cloudy. Sometimes, those certificates are worth, sometimes not so much. It depends on the country, on the contract, and how the legal wind blows at that time. There are sites where if the paper does not come from a public entity ... Well, it is like a Hogwarts diploma, beautiful but not legally useful.
Of course, even if they have a tremendous legal weight, they serve something: pure and hard marketing. That is, who does not like to teach that he has done the job before and has done well? It gives confidence. There are individuals who even ask before closing treatment, just to make sure they are not hiring a salehumo.
And be careful, in some countries, there are really norms that limit for whom these certificates are valid. Sometimes only if the government signs them, sometimes they are worth private, it depends. But even when they are not mandatory, having them always adds points.
In summary: Have certificates of good execution never hurts. If you are a company, better than collections as chromos. They open doors in public tenders and, with individuals, even if they are not law, they help you not to seem rookie. So, if you can get one, or doubt it.