It looks as though a "bono autocancelable" is a type of structured note.


If you look at the description on this site of what they refer to as "autocalls" OR "kick-out plans", you'll see that it is the exact same product as a "bono autocancelable".

Autocall products are increasingly popular with investors, advisers and product providers and should be judged on investors’ comfort, not on missed opportunities. Autocalls, also known as kick-out plans, have captured a large part of the structured product market in recent years. Product providers use them to offer higher payoffs than other SPs that automatically run to a full term. Advisers are using them to generate double-digit returns and provide portfolio diversification. Autocalls pay out a defined return providing a predefined event takes place.


here you can get a feel for the type of product a "bono autocancelable" is:
http://www.iese.edu/research/pdfs/di-0951.pdf



If you click on the "final terms and conditions" here, you will see that under the heading of "bono autocancelable", Citibank include the English terms and conditions for "autocalls":

http://www.citibank.com/spain/consumer/spanish/inversiones/p...

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Note added at 4 hrs (2013-09-11 13:05:23 GMT)
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The link didn't stick so this is the site I mentioned by the way: http://advancequities.com/en/the-latest-news/headlines/88-he...