Image processing apparatus, method for controlling the same, and storage medium

An image processing apparatus comprising:

• an acquisition unit configured to acquire post-processing information indicating a capability of a post-processing unit specified by a received print job;
• a determination unit configured to determine a target position on a recording sheet subjected to post-processing to be applied by the post-processing unit based on the post-processing information;
• and
• a printing unit configured to print a marking image at the target position on the recording sheet determined by the determination unit,
• wherein the printing unit prints the marking image so that a deviation of the post-processing by the post-processing unit can be recognized based on a state where the marking image disappears if the post-processing is suitably applied to the target position on the recording sheet by the post-processing unit, or based on a state where the marking image at least partly remains visible if the post-processing is not suitably applied to the target position on the recording sheet by the post-processing unit, and changes a shape of the marking image, according to information about an accuracy expected for the post-processing to be applied by the post-processing unit set for a print instruction of the marking image included in the print job, to a shape suitable for the accuracy expected for the post-processing.