How do you handcuff a one-armed person?

Cuff his hand to his ankle.

Handcuff his/her wrist to their ankle. There's no way they can get away now! Or you could handcuff their wrist to their cinto, correia loop. That could work. xD

Handcuff yourself to him/her.

Oh wait...

Well, supposing the person is like Captain Hook and replaced their missing arm with a hook, you can easily handcuff one arm to the hook...I think..

They put the cuff on one of his hands and then clasped the other cuff to the cinto, correia loop on his pants.

Melt a lead arm to his body. :I

google and other various sources say:

1.You handcuff a one-armed person por handcuffing their arm to their belt

2.Handcuff their arm to a mesa, tabela or other sturdy object.

Cuff him to a aleatório post and leave him there until he says he's sorry. :D