法律承诺后要约人能否进行变更？-法律综合法律援助-法律咨询免费平台-国际律师联盟

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问题	法律承诺后要约人能否进行变更？
释义	法律分析：合同合同生效后，没有经过合同双方当事人一致同意不能变更合同，反之则不能变更合同。合同的变更必须以有效成立的合同为对象，凡未成立或无效的合同，不存在变更的问题。有效成立的合同要成立合同变更，必须有合同要素的变化。法律依据：《中华人民共和国民法典》第五百四十三条当事人协商一致，可以变更合同。
随便看	劳动合同签的当天可以反悔吗今天中午签了合同，现在想反悔怎么办？帮扶政策有哪些?是怎样实施的？聚焦三：惠农税收措施或陆续出台脱贫户教育补贴政策网络侵权事件应该如何处理？网络诽谤不起诉的怎么处理？网络诽谤能怎么处理网上被诽谤怎么办网络诽谤怎么处理？请问网络诽谤如何处理遭人在网上诽谤怎么办？请问网络诽谤罪怎样起诉被人在网络上公然侮辱诽谤如何处理？网络诽谤如何处理网上污蔑诽谤法律应该怎么处理网络侵权案怎么处理被扒户籍报警有用吗？被扒户籍报警有用嘛被扒户籍报警有用么？被扒户籍报警有用嘛？被扒户籍报警有用么扒别人户籍犯法吗 -法律知识被扒户籍报警有用吗 -法律知识户籍被别人查出来了会怎么样？ agreement in simplified form agreement in writing agreement jurisdiction agreement-making power Agreement, Noncompete agreement not to give each other away agreement of alternative jurisdiction agreement of assistance agreement of Chinese and foreign equity joint venture agreement of compensation trade agreement of cooperators agreement of economic franchises agreement of investment protection agreement of joint management agreement of loans by proxy agreement of mediation in civil litigation agreement of partners in leasehold management agreement of payment by agency agreement of private persons agreement of separation agreement of transfer agreement on amendment agreement on autonomy agreement on civil air transport agreement on clothing

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