Which one is correct?

[Annecy]

Please note that Mr. Simon will obtain the signature of him / Please note that Mr. Simon will obtain the signtaure from him / Pleas note that Mr. Simon will obtain Mr.X's signature

[SoothingDave]

Not a teacher.

The last one is the best. The second is OK. The first is not natural.

[chester_100]

That's right. My second example shows why:

-Please note that Mr.X will obtain Mr.Y's signiture.
-If sufficient signatures of registered voters are obtained, you will be authorized to....