Mon 07 · 10:00
Monthly reconciliation opens — seven SSPs within 1.5% of GAM.
Independent impression count, sampled against the Post’s own page-render log. Seven partners inside tolerance. One partner showing +17.3% against GAM on video inventory.
Mon 07 · 10:04
Drill-down surfaces the surface.
Discrepancy isolated to one tag group on video pre-roll. Not the whole partner, not the whole day — a named inventory surface with a time window.
Mon 07 · 10:22
Anomaly — partner tag firing on passback where no render occurred.
Receipt fired. Investigation module pulled the page-render log for the offending tag group; 4,120 partner-side impressions matched to zero render events. Partner’s own analytics logged the passback as a served impression.
Mon 07 · 14:30
Partner call moved from negotiation to review.
The Post walked into the call with tag ID, render log, timestamp window, and impression deltas. Discussion lasted fourteen minutes. Credit processed on the same call.
Wed 09 · 09:00
Tag configuration revised at the partner side.
Monitor back to 0.4% delta on the same surface by Wednesday morning. Receipt archived; the audit trail is the post-mortem.