• Estoppel is a legal principle that is used in the common law systems of the US, UK, Canada and other countries.

  • He defends one side by forcing the other side to keep their word or by requiring her to comply with established legal facts.
  • Forms of the estoppel doctrine vary by country.
  • Types of estoppel include pledge estoppel, equitable estoppel, and promissory note estoppel.
  • Estoppel certificates are commonly used in the real estate industry and must be signed by tenants when a landlord attempts to transact a property transaction.