In doubles beach tennis, can a receiver switch sides between sets?

Yes. Each pair chooses which player receives in the deuce court and which receives in the advantage court at the start of each set. This order must be maintained throughout that set but may be changed for the next set.

Full Explanation

Per ITF Beach Tennis Rules Rule 8, at the start of each set the receiving pair decides which partner will receive in the right (deuce) court and which will receive in the left (advantage) court. This decision is locked in for the entire set; a player may not switch receiving sides mid-set. However, at the start of a new set, the pair may choose to change their receiving order: for example, the player who received in the deuce court in set 1 may receive in the advantage court in set 2. The same flexibility applies to the serving order within the pair. This allows teams to strategically adjust match-up advantages between sets.

Ruleset: ITF  |  Rule Reference: ITF Beach Tennis Rules, Rule 8 (Order of Service in Doubles)