1. A provision in a person's will designed to stop beneficiaries from contesting the will. The provision states that if beneficiaries try to contest the will, their potential inheritances will be effectively redistributed to other beneficiaries.

2. A provision in a life insurance policy designed to stop life insurance companies from refusing to pay out a claim to individuals because of fraud or error.

Investopedia Says:
1. Courts have traditionally been very reluctant to recognize non-contestability clauses in wills, and despite the presence of these clauses, courts have allowed wills to be contested.

2. Under the non-contestability clause in a life insurance policy, the life insurance company is given a one-time period in which it can contest a requested payout or claim. 

Related Links:
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Don't let bad estate planning lead to unnecessary costs and stress for your inheritors. Skipping-Out on Probate Costs
With some preparation, you can save your heirs from paying a hefty estate tax. Here are some tips. Getting Started On Your Estate Plan
Would your death leave loved ones financially stranded? Find out how to ease your mind and keep them protected. Life Insurance: Putting A Price On Peace Of Mind

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