what are the different types of estoppel 
estoppel comes in many different forms some are more common while others are lesser known they include equitable estoppel promissory estoppel collateral estoppel and estoppel by deed others include estoppel by record estoppel by deed laches estoppel by silence and reliance based estoppel the bottom linecommon law is a legal system that is based on judicial precedents rather than statutes one of the principles of common law is estoppel although it may seem complicated estoppel ensures that one party doesn t unfairly damage another by going back on their word that means that someone can t legally take back something that they ve promised to another party this is especially true if one person s actions do harm to another 