Avoidance of double payment of insurance contributions – which authorizations shall be produced in order to prove that I was insured in a country which signed a convention with Israel?

You have to produce one of the following authorizations:

• Authorization from the Social Security Institute of the convention country, detailing the periods you were insured there.
• If you have worked as a salaried employee – pay slips for each month you have worked in the convention country, yearly authorizations, similar to "Form 106" in Israel (not including the Canadian Form T4), official authorization from the employer, mentioning the period of work and confirming that social insurance contributions were deducted from your salary (the employer must indicate on the authorization your social security number in the convention country and exact dates of employment).
• If you have worked as a self-employed – authorizations regarding insurance contributions you have paid as self-employed in the convention country. (Important information: Conventions with Belgium and France do not apply to the self-employed, and thus there is no exemption of double payment of insurance contributions in Israel for a Belgian or French self-employed worker).
• If you were a student in one of the following countries: Denmark, Netherlands, Finland, Czech Republic, Switzerland or Sweden – you have to produce an authorization of period of studies or from the municipality concerning the periods you were residing there, as well as an authorization about the date of registration to that country's Social Security Institute.