When a person comes to the shul and says s/he’s Jewish, you take them at their word. Until they say or do something that causes you suspect they are lying, you have no right to act as inquisitors. Whether the person was born Jewish or converted is non of your business, and should not even enter you mind. To cross-examine them in a effort to find out is a violation of at least ten laws.
Help Support the Synagogue
By clicking on these links and purchasing your Judaica needs from these stores, you are helping support the Synagogue. For every sale made by clicking through from this site, the Synagogue will get a percentage of the sale. This is used to keep the Synagogue operational.