If no action is taken on the property before the deadline, it will be transferred permanently to the city, the World Jewish Restitution Organization, or WJRO, wrote in a statement Wednesday about the list.

The properties in question are among the 2,613 claims that were filed with Polish authorities many years ago that have remained dormant. According to legislation from 2016, which restitution professionals opposed and criticized as too limiting to affect just restitution, claimants received six months to restart the restitution process from the day the city published details about any property.

On Wednesday, the WJRO chair of operations, Gideon Taylor, reiterated his organization’s discontent with the legislation.

“It is critical that the Polish authorities take every possible step to identify and notify potential claimants. We also call on Poland to extend the very short deadline,” he wrote.

The law does not address those who did not file claims right after World War II or who had property outside of Warsaw.

Last year, WJRO launched a database that allows property searches using an address or a family name, the organization said in a statement.

Despite the absence of legislation that addresses the problem of privately owned Jewish property in Poland, Polish courts have awarded compensation and restitution to several Jewish claimants in recent years. Several Polish lawyers and experts in the field told JTA that it was impossible to know how many of the claimants for restitution for such properties are Jewish.

In 1997, Poland passed a law for restitution on communal-owned properties, but more than 15 years after the claim filing deadline, a majority of more than 5,000 claims for such property have still not been resolved and most of the resolved claims have not led to restitution or compensation, the WJRO said.