You are welcome to handwrite the delivery address on the box.
It is not a mandatory procedure but every additional form of identification might help in case the label detaches from the parcel during transit. Writing the address on the parcel does not mean that the label is optional, even if you write the address by hand you still need to stick the label to the parcel.
If you have decided to write the address by hand, keep in mind that it must be done with clear handwriting, and of course without contradicting the data on the label itself since this one will have priority over any other information.
If you have any additional information needed for the collection and/or delivery, please contact us and we will notify the carrier (phone, name of the business, local number, etc.)