How do I know this? Because right over the shortcode there's a stamp reading WENNAPUWA HNB 110. That is Hatton National Bank's Wennappuwa branch (don't know what 110 means). On the back, over the fat 50, another stamp with three encircled Ms.
I guess I'll keep this note, at least for a while.
(btw, I misregistered the zipcode
EDIT: Updated the link to HNB's branch network webpage.


