As I understand it, you can get a license via e-mail (or off the web). I don't know the specific site though. Search for "non-denominatial licenses" on Google.
Sorry for the delay! Thank you for your reply...I'll look into it.
Licenses to preach should come from a local church that is under the watchful care of a Pastor and or Elders. The Holy Spirit makes the call to preach evident in the heart of the person being called and it will be evidenced by the local church . Preaching the gospel will usually occur before a person is licensed. The license from overseers and local assembly only acknowledges the evidence and the fruit of the gift. Non denominational arena should never mean without a church. Licenses to preach should not be given by anyone apart from the sanctioning of a local church body to whom the individual is accountable.
If the Message is the Gospel of Jesus Christ Our savior, He commanded all of us to spread the good news. The Spirit will speak for you if you come in the name of the Lord Jesus. So Speak your good news to all who will listen. If they don't find the next who will. But remember that the Spirit is the teacher , we shall be taught of God, and go in His name to spread the message to all! God Loves when you preach His salvation and know your Bible well enough that when challenged you can answer in the word, but remember the word is from Jesus Himself!
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Other people asked questions on various topics, and are still waiting for answer. Would be great if you can take a sec and answer them