Most likely it wouldn't be processed, and be sent back to the sender.
the letter will be thrown away - doh
Eventually it will come back to you stamped with a note saying postage missing.
You Have to address it, and put a stamp on it.
.55 cents in Euros. for a stamp within Germany, for a normal letter size and weight. I usually pay 1,20€ to send a letter to the U.S.
an address, a postage stamp and a letter to stick it to.
There are many: Stamp Date Address sent to Return address
A stamp from Germany.
The name and address you wish to send the letter to.A stamp.
Get an address, buy a stamp and envelope, place letter in envelope, lick stamp, place stamp in top right corner of envelope, address written in the middle, return address top left corner. Then put it in the mailbox, preferrably with flag up.
Top left: your name and address Top right: the stamp Middle, middle: address of the person/corporation you're sending the letter to
stamp signature address salutation/greeting
Address label, (or possibly a postage stamp).