Check If Contacts Share Account

Working with Contacts in Salesforce often means dealing with Account relationships. One common scenario is when you want to check if two Contact records belong to the same Account basically, asking the question:

“Do these two people work for the same company?”

This is a practical and frequently-used logic in the real world for example, when you’re:

• Grouping contacts under an account

• Matching people to companies

• Checking relationship hierarchies

• Avoiding duplicate communications

In this blog post, we’ll go over how to write a simple Apex method that accepts two Contact records and returns true if they share the same Account ID, and false otherwise.

🧠 What Are We Trying to Do?

Here’s what our method should accomplish:

• Accept two Contact records as input.

• Check if both records are not null.

• Ensure both Contacts have an associated AccountId.

• If they do, compare the Account IDs.

• If the Account IDs are the same → return true.

• If they’re different or missing → return false.

That’s it — and it’s super useful when you’re dealing with relationship-based logic.

🔍 Code Explanation

public with sharing class ApexUseCaseTwentyTwo {
    
    public static Boolean checkIfConHasSameParents(Contact conRecord1, Contact conRecord2){

We define a new Apex class named ApexUseCaseTwentyTwo. Inside it, we create a static method that takes two Contact records as parameters.

        if(conRecord1 != null && conRecord2 != null){

Before doing anything, we check that neither of the input Contact records is null.

            if(conRecord1.AccountId != null && conRecord2.AccountId != null){

Next, we ensure both Contact records are linked to an Account since AccountId could be null if the Contact isn’t associated with any company.

                if(conRecord1.AccountId == conRecord2.AccountId){
                    return true;
                }
            }
        }
        return false;
    }
}

If the Account IDs match, that means both Contacts belong to the same Account, so we return true. Otherwise, we return false.

This method is safe, readable, and works well for basic comparison use cases.

✅ Why This Is Useful

You can use this method in many practical scenarios:

• In custom validation rules (e.g., avoid duplicate contacts under the same account)

• When building UI logic to display related contacts

• For reporting or automation where relationships matter

And the great part? You can extend this to other objects too like comparing Opportunities under the same Account, or Cases linked to the same Contact.

🧾 Final Code Snippet

public with sharing class ApexUseCaseTwentyTwo {
    
    public static Boolean checkIfConHasSameParents(Contact conRecord1, Contact conRecord2){
        if(conRecord1 != null && conRecord2 != null){
            if(conRecord1.AccountId != null && conRecord2.AccountId != null){
                if(conRecord1.AccountId == conRecord2.AccountId){
                    return true;
                }
            }
        }
        return false;
    }
}

🎥 Watch It in Action!

Want a quick visual demo of how this logic works? Watch the short YouTube video where I test two Contact records and compare their Account relationships.