《劳动合同法》明确规定:用人单位单方解除劳动合同,应当事先将理由通知工会。也就是说,若用人单位未履行该法定程序,即便解除事由合法,亦会因程序违法而无效。但是,在现实中有不少情况并不容易区分。譬如,“事先”通知工会,若用人单位在仲裁裁决后、在向法院起诉前通知了工会,这算不算“事先”通知工会呢?这样的通知是否有效? “Labor Contract Law” clearly stipulates: Employers unilaterally terminate the labor contract shall be informed in advance the reasons for the union. In other words, if the employer fails to comply with the statutory procedure, even if the cause of the dissolution is lawful, it will be ineffective because the procedure is unlawful. However, in reality, many situations are not easy to distinguish. For example, if the employer informs the trade union beforehand that the employer notifies the trade union before the court sued after the arbitration decision, does it not inform the trade union in advance? Is the notice valid?