Yes. You must provide a lodging receipt and a receipt for every authorized expense over $75, or provide a reason acceptable to your agency explaining why you are unable to furnish the necessary receipt(s) (see § 301-52.4 of this chapter).
41 C.F.R. §§301-11.25
Note 1 to § 301-11.25: Hard copy receipts should be electronically scanned and submitted with your electronic travel claim.