How recent is your Greek ancestry? If it goes back several generations, you are not considered a citizen.

Second of all, overstaying your 3-month visa-free period in the Schengen area by just one day should not be a problem. At worst, they’ll charge you a very small fee when you leave the country. Greece is, however, a country that unlike other EU/Schengen countries I’ve been to actually looks and stamps at your passport when entering/leaving the country (unless coming/going to/from another Schengen country.)

And finally, in order for an eligible [male] citizen do be drafted for military service, you must be in the country for longer than six months, not 3 (unless you have a student visa). This is way beyond 3-month visa-free period.

i realize the difference(1 day)is very small, but do u think its worth spending the money and changing the ticket rather than paying a fine, and getting caught up in military obligation mumbo jumbo ???

As I said, in order to be drafted for military service, you need to be in the country longer than SIX months. Your visa-free tourist period is THREE months. You need to stay another 3 months in order to get drafted.

Now, if you will be leaving the country on a non-EU passport, and face a fine a result of that, then yes I recommned the extra fee to change your ticket. Not only will this give you peace of mind, but it’s also the right thing to do. I don’t endorse breaking the laws of the host country wherever you may be, so long as the laws are reasonable (which in this case they are.) Your travel agent is an idiot who shouldn’t be in this business if he/she doesn’t understand the rules of the countries that he/she sends people to.

If you are a citisen of a visa-waiver country, staying 91 days is not a serious issue. If you are a citisen of country that requires you to apply for a visa to enter an EU country, the risk is a lot greater.

Depending on the situation with the travel agent (I don’t know the specifics of what you asked them to do), but if you particularly wronged by how they handled it, I would consider filing a complaint with the Better Business Bureau.