I rarely see any on the 4 variations pointed out in the original submit. All four of those variations are suitable. One could argue that they are extra acceptable than "Sincerely yours". Any of them could well be a refreshing transform from studying Yet one more American type letter. 知乎,让每一次点击都充满意义 https://lawyer-in-karachi52317.ampedpages.com/how-much-you-need-to-expect-you-ll-pay-for-a-good-corporate-lawyer-in-sindh-65106495