Is a release deed sufficient instead of a succession certificate?

I'm the wife of a recently deceased husband, and I'm looking to sell our jointly-owned home immediately, as the banks are pursuing us for outstanding payments. We have two sons, aged 21 and 13. Would a release deed suffice, or is a succession certificate necessary for the minor? We don't have the time or money to go through a lengthy court process for the latter. The chairman of our housing society is insisting on a succession certificate, but obtaining one could take at least a year. Given that the bank's EMI is too high and unsustainable for us, a release deed would be ideal since a succession certificate isn't feasible.