Stop using fake names immediately and start responding with your own name in all cases. Many customers will probably think: “there seems to have taken place a reorganization; cool, now I have a single contact person for all my concerns”. They probably won’t even bother to ask where the other guys are. And if they ask and you really don’t know another way out, end this odyssey with a last single lie: you had to lay them off.

It is far worse if your customers find out by themselves that you lied to them. And I would say this is rather a question of when than if. Some of them will notice that all your employees have the same writing style and/or make the same spelling errors. I’ve once uncovered a “fake” company this way. The quality of their/his service was still as good as in the beginning, but I just couldn’t trust them/him anymore …

Of course, you may lose some projects for beeing “to small”, but it’s even worse beeing known as a liar.