Dumb question, but...
 

I have asked dumber.

Live in a courtyard villa. Got stones everywhere to keep from too much maintenance.

Both neighboring house have mulch. Whin it rains on one side my driveway, or part of it is covered in mulch. The other side has our sidewalk access to the courtyard covered in mulch as well as between the stones.

When their lawn folks come, they blow grass AND mulch, and on the side where our gate is, it is blown under the gate into the courtyard.

Any ideas ? Looking for something that will keep the blown mulch at least out of our courtyard.

Invite the neighbors over for a beer and talk about your concern.

Agree, a couple glasses of wine, beer, or my favorite Scotch, and a simple discussion, like, Hey can you do me a really big favor? The lawn people you are using are not really careful and they are (insert detailed description here). It would be great if we could solve this together, followed by one or more toasts.

Or, you could politely speak to the people who do your neighbor's lawn. As long as everyone is polite, it should work out perfectly!

Thanks to all for replying !

I think Barefoot hit on it. The driveway is not that bad but the blow back under that gate is quite a bit.

Thanks again.