How can we disable duplicate check while creating record from Apex?

In case if you are looking to disable standard duplicate rule while creating record from apex – especially in case of integration and backend processes – we can use DMLOptions.DuplicateRuleHeader as below.

Database.DMLOptions dml = new Database.DMLOptions();
dml.DuplicateRuleHeader.AllowSave = true; 
Account duplicateAccount = new Account(Name='Acme'); 
Database.SaveResult sr = Database.insert(duplicateAccount, dml); 
if (sr.isSuccess()) {   
    System.debug('Duplicate account has been inserted in Salesforce!');