From what I’ve seen, universities *can* detect purchased papers, but it’s definitely not automatic every single time. Plagiarism software is great at catching copied or recycled content, so anything reused is risky. Custom-written papers are much harder to flag, especially if they’re original. The bigger danger is inconsistency—suddenly submitting work that doesn’t match your usual tone, structure, or skill level. That’s why services like 99Papers are best used as a reference or draft, not something you submit unchanged.