I wonder how Royal Mail's redirection service copes if someone's old address from which they are having mail redirected can be written in a number of different ways.
For example, if you have both a house number and a house name, some people might put both when writing to you, some might just put the house number and street name and leave out the house name, some might put the house name and street name but leave out the house number, and some might just put the house name, postal town and postcode, leaving out the house number and street name.
Also, apartment blocks sometimes also have a house number if they are numbered with the other houses on that street, e.g. 5 Lemon Court, 35 Apple Street. Some people might write the address in full, some might put 5 Lemon Court, Apple Street, leaving out the house number 35, some might just put 5 Lemon Court and the postal town and postcode, and some might put Flat 5, 35 Apple Street, leaving out Lemon Court.
I would guess that it might just be the surname (and possibly their initial(s)) and postcode that need to match for it to work, but if someone has a common surname such as Smith or Jones, there could potentially be someone else with the same surname, and even the same initial(s), who lives on the same street and whose address is in the same postman's walk area.
There's also the question of what happens if someone is having mail redirected and someone writes to them at their old address and slightly misspells their name.
For example, if you have both a house number and a house name, some people might put both when writing to you, some might just put the house number and street name and leave out the house name, some might put the house name and street name but leave out the house number, and some might just put the house name, postal town and postcode, leaving out the house number and street name.
Also, apartment blocks sometimes also have a house number if they are numbered with the other houses on that street, e.g. 5 Lemon Court, 35 Apple Street. Some people might write the address in full, some might put 5 Lemon Court, Apple Street, leaving out the house number 35, some might just put 5 Lemon Court and the postal town and postcode, and some might put Flat 5, 35 Apple Street, leaving out Lemon Court.
I would guess that it might just be the surname (and possibly their initial(s)) and postcode that need to match for it to work, but if someone has a common surname such as Smith or Jones, there could potentially be someone else with the same surname, and even the same initial(s), who lives on the same street and whose address is in the same postman's walk area.
There's also the question of what happens if someone is having mail redirected and someone writes to them at their old address and slightly misspells their name.