Here is an enlightenment on this legal query.
Indian Contract Act, 1872 clearly states that it does not affect any law in force in India according to which a contract is required to be:
- In writing
- Attested
- Registered
Indian Contract Act is not an exhaustive law relating to contract but it is also contained in other laws like Specific Relief Act, Transfer of Property Act, Registration act, etc
Therefore, It is Mandated or required by Indian Contract Act to [In writing, Attested, Registered] if it is required by any other law and not expressly repealed or inconsistent with provisions of ICA, otherwise the contract cannot be used for the purpose (like for proving the contract) which are mentioned in any law, respectively.
- In your case i.e. dealership agreement, It is not mandated or required by any law ( substituting by words: Law of contracts) to be attested.
So, if it is not required by law to be attested then as per section 67 of Indian Evidence act i.e. It can be proved by proving signature of the person by whom it is allege to have been signed. {no role of any witness}
And even if it was attested then again as per section 72 of the Indian Evidence Act, “An attested document not required by law to be attested may be proved as if it was unattested.” {again no role of witness}
Talking about the role of a witness or even, lets say about the stranger (Even if contract is not required by law to be attested) then deep knowledge of Section 92 of Indian Evidence Act is required and thorough study of Case law: Parvinder Sing V. Renu Gautam (2004) 4 SCC 794
Enjoy your one year dealership agreement !