Strong's Number G5055

teleo{tel-eh'-o}

from 5056

8:57,1161

verb

finish 8, fulfil 7, accomplish 4, pay 2, perform 1, expire 1, misc 3

Total: 26

1. to bring to a close, to finish, to end
   1. passed, finished
2. to perform, execute, complete, fulfil, (so that the thing done corresponds to what has been said, the order, command etc.)
   1. with special reference to the subject matter, to carry out the contents of a command
   2. with reference also to the form, to do just as commanded, and generally involving the notion of time, to perform the last act which completes a process, to accomplish, fulfil
3. to pay
   1. of tribute

"It is finished or paid" John 19:30 Christ satisfied God's justice by dying for all to pay for the sins of the elect. These sins can never be punished again since that would violate God's justice. Sins can only be punished once, either by a substitute or by yourself.