There sure are Irrevocable Letters of Credit. Those are used by Insurance companies, Importers, Exporters and others as paying methods. Maybe that is what you mean. Please check the web links for Letters of Credit. Hope this helps!
The insured can never amend his insurance policy without the consent of his irrevocable beneficiary because this act would lessen or diminish what is due to the irrevocable beneficiary and thus considering that this is a diminution...consent of the IR beneficiary is necessary.
You would send the insurance company a signed letter with your request. If there is an irrevocable beneficary they would have to sign as well. Be careful of any tax consequences.
No to avoid estate tax penalty
A life insurance trust is an irrevocable, non-amendable trust which is both the owner and beneficiary of one or more life insurance policies. Upon the death of the insured, the trustee invests the insurance proceeds and administers the trust for one or more beneficiaries. (Moved from discussion comments below)
As long as you did not make your beneficiary irrevocable, you can just change your beneficiary. If your beneficiary is irrevocable you are out of luck unless you can get them to authorize the change.
Liability insurance. An irrevocable trust made with the help of an attorney.
You can't cancel the letter of credit without the permission of the beneficiary, if the L/C is irrevocable.
A life insurance trust is a form of trust which is both the owner and the beneficiary of one or more life insurance policies. It an irrevocable and non-amendable trust.
There is no such thing as an irrevocable power of attorney. The principal (grantor) of the POA can revoke anything they have given someone else at any time they choose.
Some commonly used policies in estate planning to fund irrevocable trusts include life insurance policies, retirement accounts, and gifting strategies. These assets can be transferred into the irrevocable trust to provide financial security for beneficiaries and potentially reduce estate taxes.
Setting up an Irrevocable Funeral Trust Final Expense plan can now be done by attorneys, financial planners, insurance agents and funeral consultants. With the funeral trust being offered by the attorney, financial planner, insurance agent or funeral consultant, the senior doesn't have to go to the funeral home. In the comfort of their own homes, they can sign an irrevocable funeral trust that is funded with a single payment life policy.
The grantors of an irrevocable trust can take out life insurance on themselves and put it (term or whole life insurance) in the trust in order to pay the estate taxes on their estate assets when they die. This allows the grantor (giver of assets) to leave his estate assets to his children or someone else (beneficiaries) without them having to pay estate tax, or death tax as some call it.