I prefer: "Please supply alternative contact numbers if future communication is required."
The correct spelling is "otherwise" (in an alternate circumstance).
Did anyone contact you is correct.
Communication is the correct spelling.Some example sentences are:There was a communication barrier between them.His communication device is broken.I don't wish to have a communication with you.
Communication is pronounced/kəmju:nIKeI∫n/
Correct, concise and complete
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I think 'him or me' as you are contracting 'contact him or contact me'. By contrast 'he or I will contact you' because that contracts 'he will or I will contact you'
The sentence "I have many friends." is a correct sentence. An alternate would be, "I have a lot of friends".
No, it is not correct. The correct form is "contact John or me." Using "me" as the object pronoun is the proper way to phrase it in this context.
No, that is not correct.The correct spelling is communication.Some example sentences are:Communication is important when working as a team.His communication skills need working on.Keep all communication channels open.
Concise, clear, correct
By using correct language