Abstract: A method comprising: receiving a first instruction from a first user, the first instruction being an instruction to transfer to a first value from a first institution to a second institution; receiving a second instruction from a second user, the second instruction being an instruction to transfer a second value from the second institution to the first institution, wherein the first value is greater than the second value; calculating the difference between the first value and the second value; and comparing the calculated difference to a predetermined amount, wherein if the calculated difference is greater than the predetermined amount, the method comprises: automatically notify the second institution.