How to avoid no shows for unit viewings

[Dana Boyes]

I have had a lot of trouble with no shows for unit viewings lately (mostly at multi-family properties, not big apartment complexes). I go through the process of initial contact with someone who puts in an inquiry (via email, text, or through zillow/trulia listing), follow up with talking on the phone and setting up a date and time for a showing. The evening before or morning of the showing I text them to confirm. I've had a number of people not respond (in which case I don't send someone out - usually the property owner - for the showing), but in many cases the person confirms and then just doesn't show. 

How can I avoid this happening? It is such a waste of time and extremely aggravating. 

Any input/ideas are greatly appreciated!