 scale(0.75)'%3E%3Crect x='6' y='14' width='52' height='36' rx='4' fill='%23e9dcbc' stroke='%2322262b' stroke-width='3'/%3E%3Cpath d='M8 17l24 18 24-18' fill='none' stroke='%2322262b' stroke-width='3' stroke-linejoin='round'/%3E%3Ccircle cx='46' cy='40' r='9' fill='none' stroke='%239c2f22' stroke-width='2.5'/%3E%3Cpath d='M40 40h12' stroke='%239c2f22' stroke-width='2'/%3E%3C/g%3E%3Ctext x='58' y='33' font-family='Rockwell, Georgia, serif' font-weight='700' font-size='24' fill='%2322262b'%3EIRS Letters and Forms%3C/text%3E%3C/svg%3E)
CP566 — ITIN Suspense Notice, advises the applicant that additional information and/or supporting identification or exception do…
What this IRS notice code means, and what to check before you reply.
What to do next
Start with these steps before you reply.
CP566
Read the notice carefully and note any deadline. Gather returns, notices, and payment records. Book a free strategy session before responding if the amount is large, unclear, or collection language appears.
What the IRS language says
ITIN Suspense Notice, advises the applicant that additional information and/or supporting identification or exception documentation is necessary to complete the processing of Form W-7, Application for IRS Individual Taxpayer Identification Number
What it usually means
CP566 is in our IR Manual catalog. Official wording is dense — we translate it for business owners and individuals and map realistic next steps.
Related
Find another letter
Every notice in this library, sorted the way the IRS numbers them.