Witness for will

you can consult local lawyer , the lawyer will give you draft of the will, the witness should be third party and better be young age 

1.Any major with a sound mind can sign as a witness.  And the testator/beneficiary cannot sign as a witness.  2. No prescribe formate. But the testator shall mention that he is executing the will with a sound mind and without any pressure.  And the Will shall come into force only after his death and he has a right to cancel/revoke/codicil the will.   Consult a local Document Writer or a lawyer who drafts the documents.

Thanks Sir for your response. Incase the benefactor is my wife, can the witnesses be my in-laws?

yes.         They can.