What is a "Collection Items" charge as mentioned at this bank mean?

Question

I was on this bank's site called ICICI Bank and under their service charges page I noticed this charge (direct quote from page):

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Collection Items:
Collection item returned unpaid = $15.00

Please note that third-party charges/correspondent bank fees and charges may apply for collection items.
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The link is found was found here: http://icicibank.ca/personalbanking/disclosure.htm

Can someone explain to me what this charge represents?

Thanks

Answer 1

It means checks you deposited that bounced.

Answer 2

The item referred is a Cheque or Bank Draft sent for Collection with another bank.