I've just made contact with my first escort companion on TER.  How can I make sure that the escort is not involved with law enforcement or is under the age of consent?

the Rule of Thumb for newbies is to see well reviewed ladies.  This means ladies with at least 5-6 reviews by established reviewers (at least the same number of reviews but over a period of time--say a minimum of 9 months.

This decreases the likelihood of LE troubles.  Keep in mind, there is no such thing as a sure thing.

Cross ref them thru TER

Be careful on the age, especially if going to meet at a hotel. Check for reviews and in conversation let her know you're a newbie, but don't be taken advantage of, use your head, if it doesn't feel right, go with your gut.

You can also ask for ID to verify age, I've done this once.  But as others have said, if your spidey sense says something is amiss, just let the lady know and leave.

No harm no foul.