Hello. Me again, with more legal chat. Below is the legal definition of Estoppel. Legal Estoppel is used not strictly for timeshare and this post is meant only to compliment the timeshare forum administrator's general explanation.

Legal estoppel consists of estoppel by deed and estoppel by record. Under the doctrine of estoppel by deed, a party to a property deed is precluded from asserting, as against another party to the deed, any right or title in derogation of the deed, or from denying the truth of any material fact asserted in the deed.

Here's more. Perhaps more relevant to timeshare closing and a bit easier to grasp:

An estoppel certificate is a written declaration signed by a party who attests, for the benefit of another party, to the accuracy of certain facts described in the declaration. The estoppel certificate prevents the party who signs it from later challenging the validity of those facts. This type of document is perhaps most common in the context of mortgages, or home(timeshare) loans.

Charles