right to a native speaker?

[whitemoon]

If you have something to say, please contact me.
When you have something to say , please contact me.
Please contact me to have your say.
Do the above samples sound right to a native speaker?

 

[riverkid]

If you have something to say, please contact me.
When you have something to say , please contact me.
Please contact me to have your say.
Do the above samples sound right to a native speaker?

Yes, but they have different nuances.

 

[whitemoon]

Yes, but they have different nuances.

Would you like to explain please how they have different nuances?
Thank you.
With kindest regards,
Whitemoon

 

[Anglika]

If you have something to say, please contact me. You might have something you want to say...
When you have something to say , please contact me. As soon as you have something you want to say...
Please contact me to have your say. You have something to tell me - so please get in touch and we will get together so you can speak to me.

Do the above samples sound right to a native speaker?

..