Possibly. It's against the spirit of the game. Use it sparingly or not at all. Most players who've used it report no bans, but that could change with a future patch.
Since you cannot cheat the system, your best bet is to outsmart it. Here are the most effective, risk-free ways to boost your Tech Point earnings, moving away from the flawed idea of a "cheat" toward reliable, high-yield gameplay. war selection tech points cheat
War Selection has hidden achievements that grant bonus Tech Points. These include: Possibly