| New York to Paris. I purchased three tickets for my mother and my daughters to travel to Paris together for the month of July since I was already in the city for my Master's program. My children checked-in with my brother who was going to Paris for the week since they arrived at the same time. When my mother arrived at check-in, she wasn't able to because the Delta agents in New York had put her name on my brother's luggage. My brother and daughters checked in around 6:30 PM and my mother didn't get to the airport until almost 8:00 PM to check-in for the same flight. The only thing they have in common is the same last name. The solution proposed by Delta was that she pay $100 to check-in her 1 bag as a second piece of luggage or have my brother come back out from the terminal so they could "try to fix it". Once you go through security, you can't come back out to the check-in counter. How do you ask someone to pay extra for your own incompetence and negligence? When you issue a baggage label you are looking at the passport, the boarding pass and the person in front of you. That's an extra level of incompetence on the part of Delta which makes me question their level of security. After their mistake, they gave my mother the run-around for over 30-minutes, then they told her that she wasn't able to check-in anymore because check-in stops one hour before boarding. There were a ton of agents just hanging around at the counters and no other customers. While they are saying this, my children and brother are texting me that the flight has been delayed and they are waiting at the terminal for an update. Then, Delta proposed that the only thing she could do was either re-book with them for a different flight on a different day and she would have to pay for the re-booking. Then they stated that they couldn't do anything because the ticket was purchased with a travel agency. After speaking to different Delta representatives and supervisors, through some "miracle", one of them rebooked her for a direct flight with Air France. She arrived in Paris 8 hours before my children and brother which was a major inconvenience. When all was done, my mother's luggage was missing from her flight with Air France as well as my brothers' from his flight. My children' pieces of luggage arrived one after the other on the conveyer belt. It's suspect that the two pieces of luggage missing happen to be the ones with my mother's name on them. So far, my brother's luggage was delivered the day after they arrived, but my mothers' has not yet been delivered. As of today July 6th (4 days after arrival), we were informed by Air France that they never received a marked bag for her from Delta and that her luggage is likely still in New York. They think that the baggage tag was "probably removed" from the suitcase which is why it never made it on the next direct flight. She's suffering from severe chronic asthma and diabetes because her extra medication was in her luggage. Now we're in Paris, she struggled to get around the past few days and had to be taken to the emergency room by ambulance today. As someone who travels every year, I will do my best to ensure that those whom I know don't travel with Delta and that I don't take a flight associated with Delta again.