In the law of trusts the term "doctrine of merger" refers to the fusing of legal and equitable title in the event the same person becomes both the sole trustee and the sole beneficiary of a trust. In such a case, the trust is sometimes deemed to have terminated (with the result that the beneficiary owns the trust property outright).

See also

• Merger doctrine (civil procedure)
  Merger doctrine (civil procedure)
  The merger doctrine in civil procedure stands for the proposition that when litigants agree to a settlement, and then seek to have their settlement incorporated into a court order, the court order actually extinguishes the settlement and replaces it with the authority of the court to supervise the...
  
  
• Merger doctrine (family law)
  Merger doctrine (family law)
  Historically, the merger doctrine was the notion that marriage caused a woman's legal identity to merge with that of her husband....
  
  
• Merger doctrine (property law)
  Merger doctrine (property law)
  In the law of real property, the merger doctrine stands for the proposition that the contract for the conveyance of property merges into the deed of conveyance; therefore, any guarantees made in the contract that are not reflected in the deed are extinguished when the deed is conveyed to the buyer...