Methods and apparatus to share file(s)/recommendation(s) are disclosed. An example method includes verifying a first service used by a first user recommending a file and encoding a first service identification code with the file based on the first service, verifying a second service used by a second user upon receipt of a file request by the second user and/or detection of a mention of the second user in the file recommendation, searching for a second service identification code associated with the file based on the second service and encoding the second service identification code with the file, and providing the file recommendation with the first service identification code to the second user where the second service and the first service are the same or providing the file recommendation with the second service identification code to the second user where the second service and the first service are different.