Most towns have a UPS or other store that will do faxing for people. There are also ways of faxing from your computer. Personally, this is the responsibility of the client and I would just give them an option of them taking care of it, or because of the extra time needed you could do it for $$$. Pick your number high enough that the client will find a way to get it done. They are the one that initiated the loan process and you should have a signed disclosure letter before you deliver via any means to a third party.