A guarantee mortgage is a mortgage involving a third party who provides a guarantee that the terms of the loan will be met. There are several types of guarantee mortgages including guarantees by government agencies, insurance companies and private individuals. Government agencies such as the Veteran's Administration offer VA loans. Under the terms of these loans, the VA will meet the financial obligations of the borrower in the event of an inability to pay. Some insurance companies provide mortgage guarantee insurance. The borrower pays a premium to the insurance company and, in the event of the borrower being unable to pay, the insurance company would pay the mortgage. If a private individual guarantees a mortgage, that individual personally provides the assurance that the loan obligations will be met. This is different than a co-signer as the individual is not registered on the title.