On the website just click the link that says Resign (chess piece with a red x on it). On the app, click the menu while in a game, bottom-left on Android at least and choose Resign.
how do i resign?
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Always mail-in a letter of resignation; it's more dignified, and really makes it official. How rude to just press a button and retreat from the world, honestly?!! But, please, don't use a red-colored pencil, but type or use a word-processor and print your resignation document. We purists prefer not to fax it in.
Apr 17, 2016
0
#6
ChessPlayinDude47 wrote:
Always mail-in a letter of resignation; it's more dignified, and really makes it official. How rude to just press a button and retreat from the world, honestly?!! But, please, don't use a red-colored pencil, but type or use a word-processor and print your resignation document. We purists prefer not to fax it in.
+100000000
Apr 17, 2016
0
#7
karelovoll wrote:
how do i resign in the new design of chess.com?
Look for the flag icon. 
...who cares, as long as you've got a bottle of vodka nearby?
Eagerly, should you get creamed.
Resignation is an illusion. You never stop playing. Chess is forever. The pieces are playing you.
Don't worry, just sign once, but be careful no one makes you resign, including yourself.
Internet problem
How do i eesign?