I work in a e-commerce and the amount of people that forgets the street number is insane.
We send email to ask clarification: no response (probably filtered by the artificial stupidity classification in Gmail, everyone only reads the main category)
We call them to ask clarification: nobody picks up because they assume it's telemarketing
I blame the Google chrome auto fill, because it fills the whole form automatically instead of line by line like on Firefox, so people assume that it's filled correctly while instead the browser decided to omit the street number
As a customer I hate those "smart" address form as they don't accept my real house number but I need to put the generic one and hope the delivery guy is smart enough to read notes