Is it legal to use logos of customers without their permission? Do they really get permission from their customers or do they just figure it out based on the domain names of email addresses and place the logo up without notice?

Your best bet? Always ask.

Potential legal issues aside, you don’t want to be THAT guy. There’s a certain finesse that comes with being a solid business person. And one thing you’ll want to learn early on is building a good reputation, and I’m not just talking about your sales numbers.

You want to be someone that your customers can trust, right? So in order to do that, you should remember not only your best interests, but theirs as well. As some of the other answers indicate, “patent trolls” can bring a world of legal problems to you and your past customers. So make sure your customers are comfortable with being publicly affiliated with your company. It’s really that simple.

It’s easy to ask. It’s harder to ask for forgiveness.

If you have other legal questions like this, you may be interested in a new feature my company has to offer. LawTrades Micro is an affordable option (usually around $25) that allows you to ask an attorney a legal question and they will provide a customized response in 48 hours Hope this helps!