Why adhere to the rules when you've already broken them? You automatically succeed any Charisma check that would require you to have a specific identity.
As a action, you can force a character within 30 feet, who you can see, to make a Wisdom check, save DC is 8 + Proficiency Bonus + Charisma Modifier. If they fail, they are put into a dazed state and become Incapacitated for 1 minute, this effect ends if they are attacked. You may use this feature a number of times equal to your Charisma Modifier after finishing a long rest.
Additionally, you have created a second identity that includes documentation, established acquaintances, and disguises that allow you to assume that persona. You can forge documents including official papers and personal letters, as long as you have seen an example of the kind of document or the handwriting you are trying to copy. You also have a second Reputation score associated with your false identity. This score can be used to purchase as normal, but immediately results in a Bad Deal if your true identity is revealed. This Reputation score begins at 5 + your Deception modifier.