Have gone through the licensing process with several foreign airlines and CAA's. Starting procedure is to send photocopies of all doecuments including licenses and logbook pages. If the documents are acceptable you arrive there and the original logbooks are either then sent to the CAA or its done in an interview as part of issuing the license. Recommend you suggest that the logbooks and documents are sent as photocopies along with Notary verification.
I'd be pretty reluctant to send originals in the mail or UPS etc to a foreign company. Never heard of sending originals for initial screening.