Narrative:

This has now become a consistent problem and I am worried someone is going to get hurt. Several times a day [company] flights depart den flying to ZZZ; they always file for fl 220. The last few weeks they have filed for fl 220 as normal but when I take the handoff and they are switched they have broken that altitude by 1;000 ft. With no coordination from denver approach. It has happened to me personally 3 [times] this week alone and many other times to others. I asked aircraft X why he climbed to FL230 when his requested is FL220 and I had not been told he would be deviating from his requested altitude. The pilot said he was given a climb via clearance by approach without being given an 'except maintain'; so that is why they are continuously breaking their altitudes. They are going to the sids top altitude of fl 230.this is a continuous problem with west departure. They are not being clear with pilots who don't want higher than top altitude and so we are getting them expecting fl 220 only for them to go through their altitude to fl 230. A lot of times they do not ship these guys until already in our airspace; while to my knowledge it hasn't caused a deal yet; I would be shocked to hear that it does not soon. It is a dangerous situation.

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Original NASA ASRS Text

Title: A Center Controller and flight crew reported the flight crew climbed above their filed final altitude.

Narrative: This has now become a consistent problem and I am worried someone is going to get hurt. Several times a day [company] flights depart DEN flying to ZZZ; they always file for FL 220. The last few weeks they have filed for FL 220 as normal but when I take the handoff and they are switched they have broken that altitude by 1;000 ft. with no coordination from Denver Approach. It has happened to me personally 3 [times] this week alone and many other times to others. I asked Aircraft X why he climbed to FL230 when his requested is FL220 and I had not been told he would be deviating from his requested altitude. The pilot said he was given a climb via clearance by approach without being given an 'except maintain'; so that is why they are continuously breaking their altitudes. They are going to the SIDs top altitude of FL 230.This is a continuous problem with west departure. They are not being clear with pilots who don't want higher than top altitude and so we are getting them expecting FL 220 only for them to go through their altitude to FL 230. A lot of times they do not ship these guys until already in our airspace; while to my knowledge it hasn't caused a deal yet; I would be shocked to hear that it does not soon. It is a dangerous situation.

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.