Finally: The regular recovery period is going to be three years again!
The majority of import declarations are not immediately checked by Customs. On the contrary, Customs usually checks import declarations afterwards. This means that Customs usually issues an additional assessment, or an 'invitation to pay', mostly after a few months or years. However, Customs cannot recover unlimitedly. According to the Union Customs Code, the standard period for post-clearance recovery is three years, and under certain circumstances a recovery period over five years is possible.