Co-owners of the property

Your ancestral property will be divided into three parts

1. one share will be of ur father and other two share are given to your uncles

2. You cant sell someone's property but u can only sell your father's property.

Your uncles share will be given to their childrens. 

My second uncle daughters are living in USA and they are not traceable. my Question is

Can we Sell this property without there consent?

Please trace them, they are legal heirs of your uncle's property and not you.

My First uncle children had given there consent to sell the land

Can we divde the land into 3 part and sell the 2/3 part with the help of court

shally is correct

answer to another query yes by invoking partition in the proper forum 

I have a property in mumbai which is in the name of my first uncle, father & second uncle's name. My first uncle & father are demise & my second uncle has reliquish his right of the property in my father's name. My first uncle's legal heir wants to sell the property.

We currently reside in the property, we are residing in the said property for more than 30 years

Kindly reply on my below queries :

1. Can my first uncle's legal heir sell the property without our consent?

2. What documents are required to transfer the share certificate in name of my second uncle in my mother's name ( legal heir of my father) ?

3. Can we resist to sell the property?

shradha did your father executed any will and property seems to be residential house am in correct??

Its a residential property of my grandfather wherein 3 sons ( first uncle, father & second uncle) were nominee, now the share certificate is in the name of 3 brothers.

And my father & uncle has not executed any will.

Yes. You can seek and sale your part (1/3 of the property),  unless the property in question have some other issues / arguments related with it. A Coparcener / member of a HUF can seek a partition sololy for HIS part of the Hindu Joint Family property.

The (1/3) share for that UNTRACED uncle's children can be left unsold.

I have a property in mumbai which is in the name of my first uncle, father & second uncle's name. My first uncle & father are demise & my second uncle has reliquish his right of the property in my father's name. My first uncle's legal heir wants to sell the property.

We currently reside in the property, we are residing in the said property for more than 30 years

Kindly reply on my below queries :

1. Can my first uncle's legal heir sell the property without our consent?

2. What documents are required to transfer the share certificate in name of my second uncle in my mother's name ( legal heir of my father) ?

3. Can we resist to sell the property?

Its a residential property of my grandfather wherein 3 sons ( first uncle, father & second uncle) were nominee, now the share certificate is in the name of 3 brothers.

And my father & uncle has not executed any will.