(CNN) The Iowa Democratic Party, in letters sent Wednesday to the campaigns of Bernie Sanders and Pete Buttigieg, agreed to begin a partial recanvass that both campaigns asked for earlier this week.

The decision comes more than a week since the Iowa caucuses, marred by faulty technology and arcane rules, descended into chaos. It took the party days to release the full count of votes and multiple campaigns highlighted errors in those counts after they were released.

The Iowa Democratic Party said on Wednesday that they will begin the partial recanvass on Sunday and expect the process to last for two days.

Campaigns, according to party bylaws, have 24 hours to respond to the party's letter and pay the cost of having each precinct recanvassed.

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