Which is correct?
- Can you please fax me the document?
- May you please fax me the document?
Which is correct?
- Can you please fax me the document?
- May you please fax me the document?
I've often heard that one should avoid the use of "can" in a request as the word indicates the ability to do something rather than the possibility of doing something. In this case I would probably use
Could you please fax me the document?
They are both correct. However "can" entails the issue of "possibility". If you ask someone "can you" it is as if you're wondering if they are capable of doing it. "May" is typically used for requests, but I will definitely side with WindowsDude7 right above! "Could" is definitely your best shot if you want to express politeness :)