While informing the public about prominent issues in STa”M [Sifrei Torah, Tefillin and Mezuzos], Zichron Olam, in conjunction with Matzav.com, is offering free and easy STa”M assessment. Just take a picture of your mezuzos and e-mail it to email@example.com and they will have it examined by one of their expert sofrim.
The assessment is in no way a substitute for having your mezuzos checked in person by a sofer, since many things that may render a mezuzah possul cannot be seen in a photo.
This service is not associated with the Star-K, which certifies only the actual STa”M [Sifrei Torah, Tefillin and Mezuzos] sold by Zichron Olam.
For more information about prominent issues relating to STa”M, see here.