A relinquishment deed, also known as a release deed, is typically used after a testator's death to address situations where a will favours certain legal heirs while excluding others. However, a will, once validly executed, generally cannot be altered after the testator's death. If other legal heirs are excluded from benefits, obtaining their No Objection Certificate (NOC) might be necessary to enforce the will. The validity and purpose of a release or relinquishment deed in such scenarios depend on the specific circumstances and the clarity of the will's execution.