Incorrect anagram or taxpayer NIF
The error "Wrong anagram" or " NIF of the wrong taxpayer" may appear when making any payment attempt in AEAT for self-assessments or settlements/debts for charge to account or card.
It is important to check that the first letters entered in the "Surname" field, only for natural persons, match the data that appears in the census for the NIF recorded.
You can check if the data appears in the AEAT census correctly by accessing "Checking a NIF from third parties for census purposes" (requires certificate electronic).
If you have an electronic certificate or Cl@ve , you can also check this data on the Tax Labels.