Do I need an incoming fax number subscription to send faxes? iFax Support December 28, 2017 10:13 Follow You will not need an incoming fax number subscription to send faxes. You will only need credits to send your fax. - iFax Related articles How can I receive faxes? How can I receive my faxes as a PDF email attachment? How do I make sure that my fax is delivered successfully? How many credits do I need to send a fax? Can I change my incoming fax number? Comments 0 comments Please sign in to leave a comment.