Morid Hatal

The following laws apply if you said mashiv haruach u’morid hageshem instead of morid hatal:

• If you remembered before saying Hashem’s name at the end of the berachah, go back to Atah Gibor.
• If you already finished the berachah, go back to the beginning of Shemoneh Esrei.
• If the time of the next tefilah has already arrived, daven the next tefilah twice, the first time for that tefilah and the second time to make up for the previous tefilah.

For the first thirty days, if you are uncertain whether you have said morid hatal or mashiv haruach u’morid hageshem, it is assumed you have said mashiv haruach u’morid hageshem and you must go back. After thirty days, it is assumed you have said morid hatal and you do not go back.