I did. So, until a booking has been accepted (I don't do IB), there's no way for me to communicate with a potential guest other than through Airbnb's messaging center. I'm not permitted to ask for any other forms of contact, nor am I permitted to provide anything such as an email, phone number, etc. And, via the messaging center, you can't send any attachments until you've accepted a reservation - those features simply aren't made available. Therefore, even though my listing confirms that signing an agreement will be required, and that guests should be 25 and provide a form of ID so I can verify who's submitting the request, I have no way of addressing this prior to accepting. I can't even send along a welcome guide ahead of time. So, I accepted the booking, and then communicated the welcome guide via text. Because this guest has a very long and positive history with Airbnb, I sidestepped my agreement this time around, but still requested ID (of course, I've gotten no response on that). What I've done now, based on the recommendation of another host, is paste the key points of the agreement into the House Rules area. I've also created a quick reply with the language, and will simply verify that folks have read it prior to booking via the messaging center.