Package deliveries at rental property

[Alexie Franck]

Hi BP fam! I have a new rental property and the tenants have complained about packages potentially being stolen if theyre not home. I just installed keyless entry. Would it be wise for the UPS courier to have their own code to bring packages into the main entrance of the house (not inside the actual apts)? Are the Amazon workers vetted the same as UPS workers?  Any alternative strategies? 

Thanks!