Has anyone had the problem where their credit card statement from
Capital One Bank address doesn't show in the return envelope they
provide? It has happened to me for 4 months now. Why don't they fix
it? Is this a plot by Capital One to make us send our statements in
late, because if we have to write the address on the envelope
ourselves we might make a small mistake which delays their receipt
of our payment which they then use as an excuse to charge us more
money? It has gone on for 4 months now.

I've written the president of the company. Let's see what happens.