"join me in" or "join me for"

English as a Second Language English Vocabulary, Grammar and Idioms
1

What is correct?

Please join me to congradulate them in their exam success.

or

Please join me to congradulate them for their exam success.

What is the difference?

Thanks in advance.

2

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Please join me in congratulating them on their exam success.
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3

Thanks Mister Micawber, but the context is

He is inviting other to join in to congradulate other’s exacm success. In that sense, I don’t think we can say ‘join me in to congradulate them on their exam success.’ Add ‘in’ in the sentence.

4

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You have now presented a different example which of course does not require ‘me’. The ‘in’ is still fine (I think-- since there are other errors in your sentence, it is difficult to judge what you meant to write).
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5

The word ‘in’ cannot be followed by ‘to congratulate’.

I think Mister Micawber gave you a very good suggestion in his first post:

- “Please join me in congratulating them on their exam success.”
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If what you mean by ‘join me’ is more along the lines of ‘come with me’, then theoretically you could possibly say this:

- “Please join me to congratulate them on their exam success.”

In this case, the word ‘to’ would mean the same thing as ‘in order to’.
However, I think it would be much more usual to use ‘come with me’ rather than ‘join me’ in this sentence.