From FlyerGuide Wiki
Remember that to speed up handling of queries and advice relating to the Iberia Plus Programme, you can go into your "Iberia Plus Personal Space" at iberia.com and this enables you to:
Check your points balance Ask to be credited for points earned on flights already taken with the Iberia Group. Use your points to buy tickets for flights with Iberia Add and/or amend your beneficiaries Update your personal details and preferences Change your personal access PIN code Get to know your card's advantages and benefits Get the latest news of new organisations joining the Programme via the Associated Companies and promotions section
To access all these facilities you just have to enter your Iberia Plus Card number and your PIN code on the iberia.com home page, in the "Iberia Plus Personal Space" section.