未经书面授权代签无效求英文翻译在翻译劳动合同,上下文是“本合同自甲乙双方签字盖章之日起生效,涂改或未经书面授权代签无效”.请帮我想个合适的表达方式.勿用机器翻译

Question

未经书面授权代签无效 求英文翻译
在翻译劳动合同,上下文是“本合同自甲乙双方签字盖章之日起生效,涂改或未经书面授权代签无效”.请帮我想个合适的表达方式.勿用机器翻译

Answer 1

This Contract shall become effective upon the date on which this Contract signed or seal affixed by both Parties,any alternation or signature without written authorization is invalid.
供参考.