I have had the same problem with Craigslist. But, no matter what you do in real estate, someone will eventually find a way to try to scam you. The unfortunate truth is that real estate will always attract scam artists because homes are worth so much money. Siphoning off even a small percentage of the value can net a lot of money for the dishonest. However, scams usually are pretty transparent. If something in the back of your mind tells you this does not sound right, listen to that voice and be very careful.
When house is advertised for rent at an extremely low price, when an "international" buyer wants to purchase a house sight-unseen and sends a "cashier's check" on a foreign bank, or when you find a window unlatched after an open house, take extra care to protect your clients and yourself by double-checking everything and contacting the appropriate authorities. That is the best you can do.
Prudential Real Estate of the Rockies
Here is what my marketing pro suggests:
Place a jpeg (picture of your information) in your Craigslist Ad that provides the information you don't want anyone to change.
You can do this by making a screenshot of your Word docs.
Make sure you can see the entire page on your screen when you make your screenshot.
On a Mac, it is very simple.
Open your document. Press Command + Shift + 3. Presto you have a screenshot.
A screenshot of your page will appear on your desktop. Trim the jpg or png so you can only see the document. Then upload to Craigslist (in the spot where it calls for photos).
For PC, I have a link for you.
Size your type at 18 or larger. You can use photos but remember the image is going to be small when it appears on Craigslist. Use a half page or smaller for your screenshot.
You can also borrow some HTML from someone else who has mounted photos on Craigslist. Or just upload your screenshot as a photo. No one can change the photo.
My marketing guy just tried it. It works. Just fill out the information. Write a headline in the "posting description" and then choose a file for your photo or photos. Try some creativity.
Good luck with that.
This is a very common problem on Craigslist and I have run into it. A local property manager tipped me to NOT include the exact property address on Craigslist. You can use street intersections, neighborhoods, proximity to notable amenities, etc. But don't use the property address in your Craigslist Ad. This should come close to eliminating scamps on Craigslist.