- Implied Offer and Acceptance: In some situations, offer and acceptance can be made through actions or conduct rather than explicitly in words. For example, if someone puts an item in their shopping cart at a store and proceeds to the checkout counter, their actions can be seen as an offer to purchase the item. When the cashier accepts payment for the item, it is considered acceptance of the offer.

- Silent Acceptance: Silence can sometimes be interpreted as acceptance, especially in situations where there is a prior agreement or understanding. For instance, if a company sends a product to a customer without any prior communication, the customer's acceptance of the product can be inferred from their silence or lack of refusal.

- Customary Business Practices: In certain industries or contexts, it is common for offers and acceptances to be made through customary business practices. For example, in the real estate industry, submitting a signed purchase agreement is typically considered an offer, and the seller's signing of the agreement is seen as acceptance.

- Unilateral Contracts: In unilateral contracts, the offeror promises to do something in exchange for the offeree's performance of a specific act. The acceptance in such contracts is typically made through the offeree's performance of the required act, rather than through explicit words.

In conclusion, while verbal or written offers and acceptances are common, there are instances where they can be made through actions, silence, customary practices, or unilateral contracts. It is important to consider the specific circumstances and context of each situation to determine whether offer and acceptance have been effectively communicated.