All mortgages have this own funds requirement because lending experience has shown that homeowners are much less likely to default on a mortgage.
One of the complications with conventional or FHA mortgages is that they usually require that you have a certain minimum amount put toward the purchase of a home. This is particularly true any time the new home's total down payment is less than 20%.
That minimum requirement is usually somewhere between 3% and 20% of the purchase price on Conventional mortgages and 3.5% on FHA. Their rules hold that at least that amount of the down payment must come from your own funds. That contribution for the down represents your actual equity in the home, apart from any gifts or secondary financing that you might obtain to cover the rest of the down payment.
All borrowers must have their own funds or Gift funds because lending experience has shown that homeowners are much less likely to default on a mortgage if they have an actual equity stake in the property. As such, the own funds' requirement is typically not negotiable.
For this reason, all lenders will require a paper trail documenting both the existence and the source of your down payment funds. Since this is easier to do when money is sitting in a bank or investment account rather than in cash-on-hand, lenders will generally not accept actual cash as part of the down payment. mortgage payment calculator