Please do not write below the line

Truly a perfect mystery. Perhaps at one point letters were expected to be returned, and this feature of the letterhead has been copied over the years without thinking?

The OCR statement is confusing. It speaks of a customer manager trying to pass the buck down the line as quickly as possible

Because a returned letter must be associated with an account / account holder to be processed.

Though they knew this information when they sent it to the author, presumably it would be laborious to manually associate the same information with each returned letter (one would have to look it up anyway), so they probably print the data on the letter that may someday be returned, to allow quick lookup in the event it is returned.

It's equivalent to a conversation ID and interface crafted to avoid lookups, making this letter exchange idempotent, which I very much appreciate.

Why it was not requested to be returned is beyond me, but likely all such letters contain this.

Likeliest situation is all their stationary destined for send outs have the line; and in situations where the line serves no purpose it does no harm to leave it: so there is little use in having additional process around completely blank stock.

hey wait, what would happen if I wr