Umbrella Mortgage:
A special arrangement by which one document encompasses one or more existing mortgages registered on the same property. The mortgagor makes one payment to the mortgagee and the mortgagee is responsible for remission of payments to other lenders.

Underwriter:
In mortgage, a person employed by a lender or financial institution who approves or reject applications based upon the quality of the real property, credit-worthiness and ability to pay of the applicant and guidelines of the lender or financial institution with regard to ratio of mortgage loan to value of property.

Underwriting Fee:
A sum of money collected by some lenders to offset expenses incurred in the lending transaction.

Undivided Interest:
A right to possess and use real property in conjunction with other co-owner(s), in which each owner is entitled to undivided possession and use of the whole property (e.g., joint tenancy).

So if you buy a real estate property with undivided interes, you have an ownership in the entire parcel of real estate as a joint tenant with all the other holders which means each owner is entitled to undivided possession of the whole property.

Unit:
For real estate purposes, unit is an partially or totally self contained accommodation or a particular portion of a large complex that has some degre of independence.

Urea Formaldehyde Foam Insulation (UFFI):
This form of insulation was used extensively in the 1970s. Homeowners used UFFI as a wall cavity filler (sealing crawl spaces, attics, etc.) at the time in order to conserve energy. In the 1980s, concerns began to develop about formaldehyde vapor emitted in the curing process, as well as from the breakdown of old foam. Emission rates exceeding 3.0 - 5.0 parts per million (ppm) cause a variety of adverse health effects impacting the eyes, nose, and respiratory system. Consequently, its use was discontinued. The urea-formaldehyde emissions decline over time and significant levels should no longer be present in the homes today.

Modern replacement options for UFFI include melamine formaldehyde resin, low-emission UF insulation materials, and polyurethane.