Data transfer with of bar codes including presenting a plurality of bar codes making up the data transfer, displaying a unique sequence identification for each bar code and the total number of bar codes making up the data transfer; reading a plurality of bar codes; reading, for each bar code read, the unique sequence identification of the bar code and the total number of bar codes making up the data transfer; determining, in dependence upon the number of bar codes read and the total number of bar codes making up the data transfer whether all of the bar codes making up the data transfer have been read; and providing to a user a positive notification if all of the bar codes have been read; or providing to the user a negative notification if all of the bar codes making up the data transfer have not been read.