Who gets the original copy of a contract?

Could you please clarify for me who exactly is entitled to receive the original copy of a contract? Is it the party that initiates the contract, the other party involved, or is there a specific entity or individual designated to hold onto the original document? Additionally, are there any legal implications or considerations that need to be taken into account when determining who should receive the original copy? I'm interested in understanding the standard practices and potential nuances surrounding this aspect of contract law.