Not "forms of address", e.g., 'My Lord', 'Your Most Excellent Scholarhood',
et cetera, but "My office is at ...".

(N.B. Comments, please, especially if you know of other forms!)

Most of us are used to addresses of the form "123 Any Street", with a
fairly common variation of "Jedestraße 123". However, there are other ways
of defining where your office - or house, or store, or whatever - is. If,
in your worldbuilding, you use one of those other ways, you have another
hook to hang some potential trouble for your PCs...

All of the systems below are used in the real world. I even tell you where
I found it to be used.

In Nicaragua, addresses aren't numbered. Streets don't even have to be
named. Instead, the address is given by reference from a well-known
landmark location: "Iglesia Nuestra Señora de la Noche, 3 cuadras al Sud, 1
cuadra 10 varas al Este" (In English: "Church of Our Lady of the Evening,
three blocks south, one block ten varas east" [one vara is about 83cm]).
Pretty much anything can be the starting landmark - churches, parks,
important municipal buildings, gas stations... even a mile (well,
kilometer) mark along a highway. Sometimes, a landmark building gets torn
down. The addresses relative to that landmark only change with the addition
of "Donde Fue" at the beginning, meaning "Where was", or where the landmark
used to be: "Donde fue Igl. N.S.de la Noche, 3 c. Sud, 1 c. 10 v. Este".

If you are standing at the southeast corner of the block that the Temple is
located in Salt Lake City, Utah, USA, you are standing at the zero/zero
point for the entire county. Addresses in the county are all pure
coordinates measured from that point: "1355 N 700 W" is seven blocks west
of that corner, and between thirteen and fourteen blocks north. The unit of
measurement is both unspecified and irrelevant; one block is an increment
of 100.

In India, buildings aren't generally numbered, just named, or are within a
named development. Sometimes, this form of address is seen in the UK, as
well: "Cholmondeley House, Whimmeshire High Street". Sometimes, the address
is on a 'dependent street', where the actual street of location isn't
unique, and you need to specify the main street that it's dependent from:
"Cholmondeley House, Thamesford Lane, Whimmeshire High Street"

In Carmel-by-the-Sea, California, USA, there are no numbered addresses; the
only purpose for numbering would have been postal or package delivery, both
of which are handled via a central post office. Within the village,
"addresses" are given as "Third house on the east side of Torres St., green
trim, driftwood fence", or perhaps by the name on a signboard in front of
the house (and it's considered bad luck to change the names on such signs):
"Hansel" or "Sea Urchin", for example.

In most of the "Western" world, when you are looking for an address, the
street is important and gets named; the blocks are just the spaces between
the streets. In Japan, the block is important, and gets a designation;
streets are the gaps between blocks, and don't generally get names (some
important ones do). An address in Japan would be by municipality, then
neighborhood, then a subarea name and number, block number, and building
number; building numbers within a block are assigned in the order that the
building were constructed. "Tokyo-to, Chuo-ku, Yaesu 1-5-3". When giving
directions, landmarks and cross streets (if named) might be given.

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