Hi,

If a negative settlement range exist, *to* convince the seller to reduce her resistance point to create a positive settlement range or *to* change his own resistance point to creare an overlap

I would like to know is the *to* here necessary?

I reckon it is not. Please consider the following sentence: 'If you see it, eliminate it'. There is no need for the *to*. Correct. 'Eliminate' here is an imperative, and 'to' shold not be used.

For example, you could just remove the 'if' clause and say 'Eliminate it' as a very simple and unconditional order.

Best wishes, Clive

Hi again,

What about the paragraph:

If a negative settlement range exist, *to* convince the seller to reduce her resistance point to create a positive settlement range or *to* change his own resistance point to creare an overlap

Is the *to* here necessary? If yes, please advice further.

Let's remove the 'if' clause, to make the basic sentence easier to see.

*To* convince the seller to reduce her resistance point to create a positive settlement range or *to* change his own resistance point to creare an overlap.

Clearly, you can remove both 'to's',  giving you this -.

Convince the seller to reduce her resistance point to create a positive settlement range or change his own resistance point to creare an overlap.
The use of both 'his' and 'her' read a little oddly. I guess they are OK in context.

Best wishes, Clive