1) A misdescription does NOT give the lender the right to take the other property; if that were the case, anyone could essentially confiscate any property they would like to take simply by "accidentally" misdescribing the location or lot. The misdescription does not affect the rights of hte plots correct owner.2) Whether the mortgage is invalide vis-a-vis the borrower depends on the circumstances. If, notwithstanding the misdescription, it is still clear what property is affected--e.g. the loan agreement has the correct address; the loan is taken ou by you and you ony have or own one piece of property; etc.--then the misdescription in the security deed is not likely to prevent the mortgage from being enforced, since courts have the right to "reform" documents to correct obvious errors.