They don't understand and accept this practice of letting another to sign on his behalf or stamping a seal to replace the signature on writings or letters,they even think that this is a show of disrespect to the other person. 【英语牛人团】
Their style of writing or communication, signed by stamp or others to sign the alternative approach is to don't understand and even think this is not respect each other's performance.
Their language or communication, signed on behalf of others or to seal the signing of an alternative approach is understandable, even that is not respecting each other's performance