Identification Card
Every worker of Space Station 13 is issued an identification card. Your ID has your name, occupation, and a device that broadcasts your access to the station's autonomous systems, which is used both to identify the holder and open up airlocks the worker has access to. For example, the Quartermaster has access to the Cargo Bay and Quartermaster's Office, while Assistants, for example, do not. ID cards can have their access modified by the Captain or Head of Personnel. When your face is covered your ID is the only way of identifying you. Alt clicking an ID card allows you to withdraw credits, or if no account is set allows you to link an account (number found in IC tab under memories.) Smacking an ID card or a PDA with an ID inside with money, holochip or cash, will deposit credits into the account. Money is also occasionally added depending on job and species and the HoP's office has a terminal which can view certain purchases made with ID cards.
Types of ID cards
Standard ID - The basic card. This only has two wildcard slots and can carry only common accesses.
Silver ID - The Heads of Staff card of choice. This has five wildcard slots for extra accesses that can carry up to 3 common, 1 command and one private command access.
Captain's ID - The card of choice for all access. This has unlimited wildcard slots at the Captain level, capable of taking all station accesses.
Centcom ID - Identification card issued only to Centcom officials, including Death squad officers. The card of Central Command. This has unlimited wildcard slots at the Centcom level, capable of taking all station and Centcom accesses.
Syndicate ID - A black card of syndicate origin. This has unlimited wildcard slots at the Syndicate level, capable of taking all station and Syndicate accesses.
Prisoner ID - Identification card issued to prisoners, so they can be identified on the crew monitoring console and keep track of labor points. No wildcard slots at all.
Holopay
Simply hold the Alt key and press 
Ordinary left-click. It doesn't matter if Combat Mode 
Enable with 4, disable with 1 or toggle with F by default. Left-clicking people with an empty hand will Harm 
them if on, or Help 
them if off. Prevents you from switching places or being pushed when colliding with people. is on or not. on the ID card to dispense a chip containing the amount of credits of your choosing! People are much more likely to do the things you request if there is some monetary gain involved, and it's also useful for giving tips! You can insert money into your id as well. This works with more than just credit chips, space cash and coins also work.
If you need to set up a more permanent method of transactions, Right click an ID to set up a holographic pay stand! Within it, you can customize the paystand's name and minimal fee along with its logo. When someone swipes their ID or deposits holochips into the paystand, the credits go directly into your account! How dandy is that!.
In the case of an emergency, or if you for some reason need an object to throw at someone, you can dispense a chip containing 1 credit, this is helpful if you find yourself stuck in space.
Trims 
Can be edited with a PDA & ID Painter machine. The trim determines which basic access slots a card have, and also how the card holder will appear on secHUDs. A card can be granted all its current trim's basic slots without consuming wildcard slots.
Grey ID cards cannot hold Head of Staff or Captain trims. Silver ID cards can hold Head of Staff trims but not Captain trims. Gold ID cards can hold all access.
Wildcard Slots
These are any additional accesses a card can get that are not part of the card's trim. Lower rarity ID cards have fewer wildcards and the wildcards they do have are of lower rarity (common vs command).