Validation and verification are very similar.
Verification is performed to check if the design follows to specifications by verifying the documents and the design. Verification uses different methods such as reviews and inspections. In this case the person checks the documents and the files. It can catch errors that cannot be found by doing the validation.

Validation is a testing to actual product. Validation is computer based execution. It’s done to check if the design meets the customers’ requirements and specifications. In most cases it is done after the validation is completed.

Thanks,
Grzegorz Galka