@steves11 Hmmm . . . I see your point, Steve, about multiple numbers; however, I don’t encounter that difficulty, because I utilize a different process. 
PROCESS:
Answer the phone with AirPro buds.
When caller identifies company name, if I’m not familiar with them, I access the Contact List on my iPhone.
Gather additional information to determine if I’ve VETTED that business entity (while they provide additional signing details).
Enables a prompt ‘yes’ or ‘no’ response regarding acceptance of the Signing Order.