This has worked 100% for me. I hang an unlocked padlock on it too. https://www.amazon.com/Cosco-Outdoor-Living-88333BTN1E-Lockable/dp/B07XRS7TTB/ref=pd_lpo_1?pd_rd_w=nrrT4&content-id=amzn1.sym.116f529c-aa4d-4763-b2b6-4d614ec7dc00&pf_rd_p=116f529c-aa4d-4763-b2b6-4d614ec7dc00&pf_rd_r=E2MENSRS36T5WMFVDFKG&pd_rd_wg=1XgoB&pd_rd_r=2491b6c9-524c-4c39-9c7e-3e9485c5321f&pd_rd_i=B07XRS7TTB&psc=1
yeah.. along with thousands of similar products already for sale on the market.
https://www.amazon.com/Cosco-Outdoor-Living-88333BTN1E-Lockable/dp/B07XRS7TTB
Just leave an unlocked padlock on it for the amazon driver to lock after he drops the package. Many people already do this.