I prefer text primarily. Email is a good secondary contact method. If you are truly interested in seeing me the information I request is local references. If I am not familiar with your references I will ask for additional information including id, passports, work badges, buisness card, full name, your buisness number, any information to prove identity is appreciated. This however will not guarantee I will see you it is based upon my comfortabilty that you are safe and a gentleman.