It's not just for people changing
their driving licence, evansmr1. Everybody holding a Greek driving licence, Greeks, foreigners, whoever, has to renew it every 3 years once they reach 65. There is a new law (or proposed new law?) such that they will all have to resit a practical driving test when they reach 74. There are two possibilities:
1 Either the new law has not yet come into force in which case you should be able to exchange your licence without a problem and without taking any test. Unless you are 80 or over KEP should be able to do all the administrative work for you. If you are over 65 you will need to visit an approved pathologos and get a medical fitness certificate and an approved ophthalmologist and get an eye test certificate. KEP should be able to give you a list of approved doctors. They should be able to complete all the paperwork for you including forms to take to the bank to make the necessary payments and to the doctors. You will need at least 4 passport size photos. When you take everything back to them they should be able to submit all the paperwork for you. You will need to surrender your existing licence so make a photocopy. They should be able to give you a form verifying that you have satisfied all the application conditions and you can use that in lieu of a driving licence if you are stopped by the police before you get your Greek licence. It can take up to a couple of months to get the new licence so make sure you are not travelling abroad for at least that period as the KEP paper will not satisfy non-Greek law enforcement.
2 Alternatively the new law has come into force in which case I would have thought at least KEP should know about it and I would have thought some driving schools would be aware.
Have you tried simply asking KEP if they can change your licence for you? I changed mine many years ago at a driving test centre but I have renewed it through KEP several times with no problem. If you are under 65 you don't need to have the health and eyesight checks. Once you turn 80 you need to undergo additional health checks, including a psychiatric test, and KEP can no longer do the administration. You then have to go to a driving test centre.
Some KEP offices are very unhelpful and some are excellent. If one office tells you that they cannot do it try asking at a different office. There are two offices about equi-distance from me to the south west of Chania. The one under the town-hall in Gerani is completely useless. The one in Vamvakopoulo is very good. All ex-pats that I know locally are aware of the difference. I would guess there must be ex-pats in your area that can advise which office is best to use.