Is this grammar correct is for your kind approval and signature?

The grammar is not quite correct. The phrase "is for your kind approval and signature" is awkward and could be rephrased for clarity and professionalism.

Here are some better options:

Formal:

* "This is submitted for your kind approval and signature."

* "Please review and approve this document. Your signature is requested."

* "For your review and approval, please find the attached document."

Informal:

* "Please review and sign this."

* "I'd appreciate it if you could take a look and sign this."

Choose the option that best suits the context and your relationship with the recipient.