The significance of a # sign

My old address:	My new address:
32 BlueLeaf Lane #77	32 BlueLeaf Lane 77
Salem, SK 75052	Salem, SK 75052

Well, at least according to my bank...

Today my bank sent me a letter in the mail to thank me for changing my address.  It was addressed to the old address and said they wanted to verify that my new address was correct. 

On the very same day, I also received a letter from the bank, addressed the new address notifying me that my address had been changed.

So what's the big deal?

• I'm impressed with the postal system.  I didn't fill out a change of address card or anything and they were still able to deliver my mail to my new address.  That's service!
• I'm impressed with my bank. Apparently my address is changing and I wasn't even aware of it. Thanks for the heads up, guys!
• I'm impressed with the use of resources.  I mean, I needed those two pieces of paper and the two envelopes they were mailed in.  In fact, I think I'll go waste some more trees!

And now I think I'll just sit back and relax and wait for the bank to send me my new checks.  The ones with my new address on them.

p.s. I lied.  That's not really my address.  But I do live in the state of SK.  I swear.