DAKs — similar to PIF (Play or Pass It Forward)

A group establishes a wish list central created by members who are willing to participate.

Each member creates a wish list — items/things they want, need, looking for. The list is limited to a certain number of items established by the group owner/moderator(s) and/or list keeper. 
The wish list is posted to a file or database.
Some files are within a group or use Google Documents (send invites to others on the list), some establish private blogs (invites only) or some are just sent out as an email. 
Names and addresses are included on this list as well as items.

Other members read the lists and if someone has something they want to “toss” or PIF, they send the item to that person.

In some instances, even if something is not on a list, and you have something you wish  to send, that is allowed also.
If you receive a DAK, you must return a DAK to someone else to keep the circle of giving going.
Time limits for each DAK list may be limited or unlimited however, every once in a while, all wish lists are deleted and then people are asked to start a new list.
Mostly this is done because, people leave lists, address changes, or there is no interest.
Like any other swap, if you are on a DAK list, you must be committed to the rules and regulations established by the group.
At times, the list keeper keeps track of who sent what to who.
If you are a taker not a giver on the list, you could be considered a flake/flaker and are removed.

Most DAKs should fit in an envelope but if you have larger items, like booklets or magazines, then use a larger envelope and you can send it Book-rate.

On your envelope, mark it DAK — Name of Group you are doing this through.

If you wish to remove yourself from the list, you can delete your file or ask the file master to delete it for you, depends on who has the ability to upload or controls the files.

PIF Swap Details