WES is not a notary agent, but an agent which will do your degree evaluation, e.g., if your Ph.D. earned from the other country is equivalent the Ph.D in states. Since it required original version of the degree/transcripts, mostly the WES results will also be considered as official.
There are actually several such agents in states, not just WES, but if company requires WES, just do it.
There are actually several such agents in states, not just WES, but if company requires WES, just do it.