vouch /vάʊtʃ/ 保証する confirm

Alongside the states, key businesses in Australia like Nike, the Pact Group, McDonald’sand Nestlé have already vouched to switch plastic found in products like uniforms, packaging and cutlery to renewable and recycled materials. 

https://www.globalcitizen.org/en/content/australia-to-phase-out-single-use-plastic-2025/