What rates do they charge?
We went through this exact scenerio when we built a new house in San Antonio, TX. I made three deposits into my savings account (total $5K) and the mortgage underwriter demanded copies of the checks deposited and what they were for. Ever since the Savings and Loans fiasco where people were given home loans despite not being able to pay the, the US Government has really tightened up the home loan process. The lenders are told by the government regulators if they don't follow the rules to the letter they will be shutdown. The underwriters are terrible to deal with. We flew into Texas on a Sunday, inspected and accepted the house on Monday, expecting to close on Wednesday. We were nickel and dimed to death for financial records and finally closed around 6PM on Friday. Our neighbors in their 70s and Ray is also handicapped finally closed at 2 AM one day.If there is no bank trail for the funds, there may be problems in purchasing a property. In the US, they generally want to know origin of funds for any real estate purchase.