user62167: Is it possible to give an expiration time to a Bitcoin transaction so that after a definite time, it can no longer be mined? 

user51948: No, bitcoin transactions that stop being valid after a certain point in time are not possible

62167: <p>Is it possible to give an expiration time to a Bitcoin transaction so that after a definite time, it can no longer be mined? </p>
 51948: <p>No, bitcoin transactions that stop being valid after a certain point in time are not possible</p>
