(rev. 6/28/2021) Possibly. As a general matter, sellers can control who accesses their property so long as those restrictions are not discriminatory in nature. Now that vaccines are widely available, it would not be unreasonable for sellers to impose a vaccination requirement for access if they wish, so long as they also would allow appropriate accommodations for individuals who claim exceptions related to disability or religion (or any other valid category of exception).
Keep in mind that a seller who imposes this requirement may not want to work on the honor system, and might ask the buyer agent and/or listing agent to collect vaccine verification. Seller may even want to collect or review that information themselves.
While there is no legal reason a seller/agent/broker could not make these inquiries, brokers should consider whether they are comfortable in such a relationship. For example, do you feel confident that the agent(s) asking for verification are able to maintain the confidential nature of this information? If the seller wants to see verification, are you comfortable that the seller will do the same?
PAR is not offering a recommendation of whether brokers should or should not be involved in this sort of process - that is ultimately a brokerage business decision. But it may be worth noting that PAR does not have a form for this purpose.