This is common practice in all forms of business. For example, I work in a small machine shop here in Phoenix. Honeywell, one of the largest aerospace and computing manufacturers in the world, outsources machining jobs to many other large outfits, like say Jet Products. Now, Jet (which is large, but not nearly the size of Honeywell) take the job, but either may not have enough machines or manpower to get it done (or only wants the profits without the labor required), so they send it to a local, small-time shop like ours. We run the job, send it back, and Jet pays us for the work. Honeywell is pretty much oblivious to our involvement, and we're never officially acknowledged. To them, it was Jet all along. Things like that happen all the time.