Click on the glossary term to see the definition
A doctrine of the law of evidence which prevents 'A', who has made a representation to 'B', from denying that the representation was true and valid when 'B', who has acted in reliance upon the said representation, later tries to rely upon it in legal proceedings to defend a claim (or exceptionally to assert a right) against what would, but for 'A's' statement or act, be in accordance with 'A's' rights.
E.g. 'A' told his tenant, 'B', that for the duration of World War II war only one half of the rent due each month need be paid. 'B' acted in reliance on this unsupported statement and paid only half of the rent. After the war 'B' was confronted by a demand for back rent which covered some of the sums which 'A' had assured him he need not pay. 'B' could plead 'A's' statement to defend against the back rent claim and raise a promissory estoppel in his (B's) favour. 'A' was estopped from denying the truth and validity of his otherwise unsupported statement.
The three self-help rights which an unpaid seller may be allowed by the Sale of Goods Act 1979 (potentially in addition to the possibility of suing the buyer either for the price or for breach of contract). Each real remedy is rendered ineffective if the buyer gains possession of the goods. The three rights are very important on a practical level as they do not require the seller to instruct a lawyer or to go to court: thus they are very commonly employed. The rights are:-
The remaining chapters (17 - 20) contain no terms which require further elucidation.