Narrative:

Denver sector X handed us off two aircraft at the same altitude on collision courses at FL350 with no positive separation ensured. Aircraft X checked on at FL350 south east bound. The aircraft that was slightly behind at FL350; aircraft Y; was not on our frequency and he needed to be turned to avoid loss of separation. We reached out to denver sector Y to instruct him to turn aircraft Y to the left (apparently denver X took a point out) and denver Y said he was no longer talking to that aircraft. We broadcasted in the blind for aircraft Y. We had to turn aircraft Y while still in denver center's airspace to ensure separation! Without the turn aircraft Y would have lost separation one minute inside our airspace! This is a daily occurrence that has been going on for 30 plus years but seldom gets reported because of a lack of safety culture.

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Original NASA ASRS Text

Title: ZMP Controller reported an unsafe situation when Denver Center handed off two aircraft on a collision course.

Narrative: Denver Sector X handed us off two aircraft at the same altitude on collision courses at FL350 with no positive separation ensured. Aircraft X checked on at FL350 south east bound. The aircraft that was slightly behind at FL350; Aircraft Y; was not on our frequency and he needed to be turned to avoid loss of separation. We reached out to Denver Sector Y to instruct him to turn Aircraft Y to the left (apparently Denver X took a point out) and Denver Y said he was no longer talking to that aircraft. We broadcasted in the blind for Aircraft Y. We had to turn Aircraft Y while still in Denver Center's airspace to ensure separation! Without the turn Aircraft Y would have lost separation one minute inside our airspace! This is a daily occurrence that has been going on for 30 plus years but seldom gets reported because of a lack of safety culture.

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.