Narrative:

Flight had just finished boarding. I did my passenger count and handed it to the pilots; just as I was about to head back to the rear of the plane the gate agent stopped me. He then handed me two; what looked like boarding passes and said that I needed to upgrade yyd to zzd; as she was next on the upgrade list; and also pointed out that the other paper was an interrupted travel itinerary for passenger xxd. He then told me that the passenger in xxd may have had a bit too much to drink earlier so keep an eye on him. I asked the agent if he was going to be an issue and he said that he should be fine but wanted to give us a heads up just in case. I then upgraded the passenger in yyd to zzd and checked on the passenger in xxd and he appeared to be fine. I had no issue with him and he did not cause a scene or anything else. I then went back the aft galley and called the flight attendant-a and told them to make the ca aware of the situation of the passenger in xxd; but to also let him know that there were no problems and we felt fine taking him with us on the flight. The passenger slept for most of the flight and did not want any snack or beverage during flight. Once we landed the passenger in xxc told flight attendant-a as he was deplaning that the passenger in xxd had urinated in the seat during landing and was wiping the seat down as he left. Flight attendant-a told the ca and the ca called for hazmat to come clean the seat. When cleaning/doing seatbelts both I and the other flight attendant did not touch seats xxc/D and also warned the incoming crew.my main concern is not the possibly intoxicated passenger as he was fine there were no issues at all. I'm mainly concerned about how the gate agent handled this situation. He never made the crew or ca aware of this passenger until just before shutting the main cabin door. We as a crew never had a chance to discuss the situation until it was thrown at us right as the main cabin door (mcd) was being closed. These type of situations should be brought to our attention as soon as possible. Again I want to say my main concern is with the gate agent not handling this situation properly.

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Original NASA ASRS Text

Title: EMB175 Flight Attendant reported being informed by the Customer Service Representative as the main cabin door is closed; that a passenger they boarded is intoxicated but shouldn't pose a problem. He did not; but the passenger seated next to the possibly intoxicated passenger informed the Flight Attendant during deplaning that the possible intoxicated passenger urinated in his seat during landing.

Narrative: Flight had just finished boarding. I did my PAX count and handed it to the pilots; just as I was about to head back to the rear of the plane the gate agent stopped me. He then handed me two; what looked like boarding passes and said that I needed to upgrade YYD to ZZD; as she was next on the upgrade list; and also pointed out that the other paper was an interrupted travel itinerary for PAX XXD. He then told me that the PAX in XXD may have had a bit too much to drink earlier so keep an eye on him. I asked the agent if he was going to be an issue and he said that he should be fine but wanted to give us a heads up just in case. I then upgraded the PAX in YYD to ZZD and checked on the PAX in XXD and he appeared to be fine. I had no issue with him and he did not cause a scene or anything else. I then went back the aft galley and called the FA-A and told them to make the CA aware of the situation of the PAX in XXD; but to also let him know that there were no problems and we felt fine taking him with us on the flight. The PAX slept for most of the flight and did not want any snack or beverage during flight. Once we landed the PAX in XXC told FA-A as he was deplaning that the PAX in XXD had urinated in the seat during landing and was wiping the seat down as he left. FA-A told the CA and the CA called for hazmat to come clean the seat. When cleaning/doing seatbelts both I and the other FA did not touch seats XXC/D and also warned the incoming crew.My main concern is not the possibly intoxicated PAX as he was fine there were no issues at all. I'm mainly concerned about how the gate agent handled this situation. He never made the crew or CA aware of this PAX until just before shutting the main cabin door. We as a crew never had a chance to discuss the situation until it was thrown at us right as the Main Cabin Door (MCD) was being closed. These type of situations should be brought to our attention as soon as possible. Again I want to say my main concern is with the gate agent not handling this situation properly.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.