Ralph's specialty is forging documents and selling consumables. If he's convinced that he can trust the player through a 50 Speech check, Ralph will sell the player fake passports to the Strip for 500 caps, or 375 with a 50 Barter check.
pcps3xbox360 Ralph can be occasionally found dead in the street if he's attacked by a randomly spawned Freeside thug. The only way to fix this is by respawning him via console commands. [verified]
pcps3xbox360 Sometimes upon interaction with Ralph, there will be no option to say goodbye. You will have to browse his inventory before the 'goodbye' command will be there. [verified]
pcxbox360 Sometimes the option of getting the holotape from Ralph will disappear. Presumed to be fixed by reloading from before the conversation was had, unsure if fixable after the fact. You may also be able to get around this by leaving and coming back the next day. [verified]
pcxbox360 If the player passes both (or possibly just the first) conversation checks with Ralph regarding the fake ID, but opts not to buy the forged documents, then waits some time and comes back later without finishing the quest that usually precedes buying the ID, the option to buy the fake ID will be gone. [verified]