Due diligence

In a previous company, they sent a contract to a customer, customer edited the contract and signed it, then the company counter-signed it.That was a bad situation.— "@SwiftOnSecurity" 3d12Wikip. r.10d18 "Due diligence is an investigation of a business or person prior to signing a contract, or an act with a certain standard of care."
"action that is considered reasonable for people to be expected to take in order to keep themselves or others and their property safe." Camb.Di. r.10d18
* See: Best practice; Standards.