If a person receives 3000 from a Joint account is that considered as 1500 from each in the Joint account?
For example, could the Joint account holders gift someone 6000 from the joint a/c representing 3000 from each joint a/c holder.?
Yes. A gift from a joint account will be presumed to come equally from each of the accountholders unless — and this would be unusual — there is good reason for thinking that this is not the case.