I can hear it there when this is spoken, but I am not convinced it needs to be there in written form. In order to pass [...] data protection, the customer ...
I would not put one there myself. The final example, "On the other hand, I haven't seen anyone put a comma as I did in my sentences above" is a ...
“The two initial boxes marked in red” do not need or wish to “sign and return the documents”; you, the presumed reader, need or wish to do that.
A dependent clause needs an independent clause to form a complete thought.
See if the sentence still makes sense if you switch the order of the adjectives. If it does, you need a comma/commas. If it doesn't, you can't use a ...
Use a comma before the conjunction (and, for, but, or, nor, so) that
To further clarify, if they are in the same category, the order does not matter. If you are a ...
by looking for key words/groups such as although, if, as, in order to, and when:.
Q: So when do writers need to use a comma?
See if you can figure out the following riddle: When you really need one,