If you are applying for any type of Czech visa / residency, you need to present a proof of accommodation or rental contract. Since you will not be giving your original contract you will have to make a legalized copy of the rental contract which can depending on the number of pages you have expensive ( 33 kč per page ) That is why we are recommending everyone to get a proof of accommodation.
Signatures and authorizations
Proof of accommodation should be signed by the legal owner of the property or it can be signed by the person representing them in which case you would have to provide the original Power of attorney or legal copy of the power of attorney. If you are a Non-EU citizen then the signature of the owner should be legalized.
If you are an EU-citizen, signature of the owner doesn’t need to be authorized unless you are applying for a Czech Permanent residency!
Duration of the proof of accommodation
If you are an EU-citizen duration of of the proof of accommodation doesn’t have a fixed period requirement.
Non-EU citizens’ duration of Czech residency/visa depends on the duration of the accommodation proof. For example, if your proof of accommodation is for 2 years, your long-term residency will be also for 2 years.
It is important to have an proof of accommodation for maximum period of time. According to he Czech immigration first long-term visa is issued for maximum 12 months from the date of approval. If you are hoping to get your fist visa for the maximum period of time, your accommodation proof should be for at least for 16 months because your visa approval process can take up to 4 months